The Sixth Ingredient: How Packaging Shapes Palatability

How Packaging Shapes Petfood Palatability

The Sixth Ingredient. We validate the recipe, we validate the cook and we validate the bag, each to a high standard, in separate rooms, and the animal lives in none of them. On the sterilising heat that makes a wet food's flavour and costs it, the aroma the package quietly takes, the faults it adds, and why a pack sized for the shelf is part of what the animal finally eats.

Movement I

THE SIXTH INGREDIENT

Is the food you tested the food the animal eats? Picture two bags of the same dry cat food, side by side on a shelf. Same formulation, same production batch, the same palatant applied at the same rate over the same fat coating, the same moisture the day they left the line. One is a multilayer laminate with a high barrier to oxygen and moisture. The other is a simpler, more recyclable structure. Both are properly sealed, both meet their specifications, both carry the same name and the same declaration. Six months later, someone opens them. Are they still the same food?

Nutritionally, perhaps. Legally, perhaps. But a cat does not eat the nutrition panel, and the sensory answer is less obvious, and more interesting, than we usually allow.

We have become remarkably good at formulating food, and remarkably good at packaging it. Both are mature sciences. The packaging engineer measures oxygen transmission and water-vapour barrier and seal integrity, and runs the shelf-life trials; the formulator measures protein and fat and fibre, optimises the cook, and tests whether the animal will accept the result. What rarely happens is that the two are validated as one thing, the food in its package, as the animal finally meets it. The disciplines are sophisticated. They are also, for the most part, practised in separate rooms.

And food does not stop being chemical matter when the filling line seals it. The fats are still oxidisable. The volatiles are still partitioning between phases. Water can still move, within the food and across an imperfect barrier. The packaging can take compounds out of its contents, and compounds can travel the other way. None of that makes a package dangerous, and modern packaging is engineered precisely to hold these processes in check. But it means something the development sheet rarely admits.

The package is not an ingredient in the formulation. It is nevertheless part of the food that gets eaten.

Call it, loosely, a sixth ingredient: the one that never appears on the label, that is tested for its barrier and its shelf life but rarely for its taste, and almost never as the animal meets it, from a bag opened and reclosed for a month. And here is the thread this Conversation will follow, borrowed from No. 16. We said, of alternative proteins, that a food can fail two opposite ways, by lacking the signal the animal wants and by carrying one it does not. The package can push a food either way, and not only on the shelf. For wet food it begins at the moment of manufacture, because the food is cooked inside the sealed pack; for dry food it runs on through every week in the warehouse and the cupboard. The package can take the signal away, and it can add a fault of its own. It is capable of the same two failures as the formula, and we rarely put it in front of the one judge who would notice, under the conditions the animal actually eats.

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Movement II

THE PACKAGE THAT COOKS THE FOOD

When is a package not a container? When it is the pot the food was cooked in. For wet pet food, the can, the pouch and the tray are exactly that. The food is filled, the pack is sealed, and only then is the whole of it heated, hard and for a long time, under a validated thermal process, until it reaches what the trade calls commercial sterility: not every last microbe killed, but enough that the unopened pack stays safe and stable on a shelf for years without refrigeration. The cook happens inside the closed package, with the food already in its final home. So for a can of cat food the package is not holding the finished product. It is the vessel in which the product was finished.

That cook answers to a governing requirement, and the requirement is safety. The schedule must deliver enough accumulated lethality at the slowest-heating point in the pack, wherever the product and the process put it and not always the geometric centre, to destroy the organisms that could make the food dangerous or let it spoil; that point is found by heat-penetration study, not assumed. Other things shape the schedule too, the equipment, the integrity of the seal, the quality the product must keep, but safety is the floor none of them may breach, and flavour is not on the list at all. The lethality even has a name in the trade, the F-value, an equivalent thermal lethality rather than a fixed target; what counts as enough depends on the reference temperature, the organisms in view and the validated process, not on a single number any two foods must share. It is a magnificent piece of engineering. It is simply not pointed at taste.

The retort schedule is written for the organism we must kill, not for the flavour we would like to keep.

Here the geometry of the package quietly takes a hand. Where a food is dense and pasty enough to heat mainly by conduction, heat crawls in slowly from the walls, and the slowest point lags well behind the edge; to bring it up to a safe value, everything around it is held hotter for longer than it needs, and over-cooks while the middle catches up. A thinner pack, a pouch or a shallow tray, can offer the heat a shorter path to that slowest point, and cook the food more evenly and more quickly. A tall can offers a longer path, and often pays for it in over-processing. I say can and often, not must, because the real heat penetration also turns on fill thickness, viscosity, how the pack sits, whether the retort agitates it, and how hot the food started. Geometry shifts the odds; it does not settle them. The format was chosen for filling, distribution and cost. It also helped set the heat-penetration profile, the processing time required, and the thermal history the food actually lived through.

The contrast with milk makes the point, because dairy shows what becomes possible when microbial inactivation and quality loss fall away at different rates with temperature. For suitable products a very high temperature applied for a short time can deliver the required microbial inactivation while sparing much of the quality. The principle runs through high-temperature, short-time processing and, at more severe conditions, through the ultra-high-temperature sterilisation of milk, though how far the two can be pulled apart still depends on the organism, the reaction and the food itself. And it leans on a freedom wet food lacks: in aseptic processing the product is sterilised as it flows and then filled into an already-sterile pack, rather than being sterilised inside it. A viscous meat emulsion sealed in its can before it is cooked has no such escape; its heat penetration is set by conduction and by the shape of the pack, and the hot-and-brief route mostly closes. Wet pet food lives nearer the slow, hot, long end, whether or not that is where its flavour would have chosen to live.

What happens to the food along the way is the part the safety requirement was never asked about, and it is the argument of No. 14 at its most extreme. The same heat that sterilises is the heat that browns, and the cook is where much of the meaty, roasted, savoury character of wet food is actually generated, the Maillard and related reactions that give a sterilised pâté a smell a cat will cross a room for. So the retort is not merely a tax on flavour. It is, in part, the maker of it. But the very same heat also raises cooked and sulphurous off-notes, drives the oxidation of fragile fats, and quietly costs the food some of its most heat-sensitive nutrients. The process that creates the signal creates the fault as well, in the same minutes, under a schedule set for neither.

Which returns us to the harder question. The thermal process can be optimised, as dairy proves. But optimised for what? For the recipe cooked as if in open air, or for the recipe as it actually sits, in that pack, of that shape, undergoing the reactions that this food in this container will undergo, desirable and otherwise? Those are not the same target. The task is not merely to settle on a safe thermal process; it is to understand how that process, meeting this recipe inside this package, shapes the food the animal is finally handed.

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Movement III

WHAT THE SEALED PACKAGE TAKES, AND WHAT IT ADDS

Once the pack is sealed and sitting, is it doing nothing? It looks inert. It is not. A sealed package is in slow chemical conversation with the food inside it, and the conversation runs both ways. It can take something out of the food, and it can put something in. These are the two failures of No. 16 again, now committed by the container rather than by the recipe.

Take the quieter direction first, the one discussed almost nowhere outside packaging and flavour science: aroma scalping. A volatile molecule that was in the food, or in the headspace around it, can partition into the packaging material and be held there. That is the package taking the aroma up, and it is worth separating from its neighbours. It is not the molecule passing all the way through the wall and escaping, which is permeation; nor the aroma settling back into the food's own fat; nor the molecule reacting into something else. It is the wall offering itself as another phase for the smell to dissolve into.

It is tempting to picture this as the food merely growing fainter, losing a little of everything evenly. That is not the interesting case, and often not the real one. The compounds that make an aroma do not contribute equally; some sit at vanishingly low concentrations and carry much of the character. If the material takes up some of them more readily than others, the food can keep most of its total volatile content and still lose the few compounds that mattered most. The balance shifts, and the aroma that remains is not a weaker version of the first. It is a different one. Sorption, strictly, is only the physical taking-up; it earns the uglier name scalping when what it removes is aroma the food needed, and not every molecule that enters the wall was one the animal would have missed. The question, as in No. 9, is not how much aroma a laboratory can still extract. It is how much is still available, at the bowl, to reach the animal.

Aroma is not merely created. It must also survive.

Now the other direction, what the package adds, or lets in. Some of the addition is the package's own chemistry. A packaging structure is not always one perfectly inert film, and under the right conditions a little of something, from an additive, a residue, an adhesive or an ink, can migrate from the wall into the food. The discipline matters here, because the presence of a compound in a material does not prove it migrates, and migration does not prove an off-taste, any more than it proves a hazard. But where it does cross over and carry a flavour, the result is a taint the animal never agreed to, laid onto the food by its container.

Most of what the package lets in, though, comes through the barrier rather than out of it. Oxygen is the first. A food full of unsaturated fat will oxidise given air and time, and a barrier that passes oxygen, or a headspace that trapped some at filling, feeds that slow change. Oxidation can turn the fat that carried the signal, the subject of No. 4, into a source of the opposite: the stale, the cardboard, the rancid. The chemistry runs in a known direction, and that much is not in doubt. Whether the animal minds, and from what point, is a separate question, and not one an oxidation number can settle on its own, the more so since those markers themselves rise and fall as the reaction proceeds.

Moisture is the second, and it brings No. 13 back by another door. A barrier that passes water vapour lets the food drift toward the humidity around it, and here two properties that are easy to confuse pull apart. Moisture content is how much water is present; water activity is something different, its availability. Neither acts alone, but together with the food's structure, composition and temperature they bear on how a kibble fractures, how its coating behaves, and how readily it gives up its aroma. A piece that has taken on a little moisture is not merely damper; it can behave like a different piece in the mouth and at the nose. Whether that helps or harms acceptance is, again, the animal's question to answer, not the hygrometer's.

A barrier is not a promise that chemistry has stopped. It is an attempt to control how it continues.

Three doors, then, and worth keeping apart, because the key to one does not always open another. The aroma that soaks into the wall leaves by sorption; the taint that comes the other way arrives by migration; the oxygen and the water cross by permeation. Improving a film's oxygen barrier need not touch its scalping, because stopping oxygen and holding volatiles are different properties of the material, and the one that excels at the first is not always the one that excels at the second, though a change made for the one can sometimes shift the other. Even standing still on a shelf, the package is not one problem. It is several, wearing one wrapper.

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Movement IV

THE BAG SIZED FOR THE SHELF, NOT THE CAT

What happens the moment the bag is opened? Until then, the protections we have described are doing their work; after it, the system changes. The seal is broken, the headspace trades with room air, and the food begins a new storage history, one shaped by how often the pack is opened, how well it is reclosed, and how long its contents sit inside before they are eaten. A good reclosure slows that history; a torn bag or a bent clip hurries it. But the sealed state is over, and a question the specification sheet never asks has started its clock: how long will this package stay open?

That answer is set by a decision almost no one treats as a palatability decision: the size of the pack. A bag or a can is sized for the shelf and the checkout, for the economics of filling and of buying, and rarely for how fast one small animal actually empties it. A large bag bought for a single cat is opened once and then returned to, a little at a time, for weeks. By the time the last portion reaches the bowl, it has spent far longer in a repeatedly opened package than the first portion did. Its formulation has not changed, and it came off the line in the same batch; its age and its exposure have. The food the cat eats in week four is three weeks older than the food it ate in week one, from that very same batch, and it has spent those three weeks in a pack opened and reclosed again and again.

The bag was sized for the shelf. The animal eats on its own clock.

Wet food brings the question into the kitchen. A cat may eat only part of a can or a tray, and the rest is covered, refrigerated, and offered again. By the second serving its temperature, its headspace, its surface and the way it releases its volatiles may all differ from the freshly opened product. Does the cat notice? Does it care? And if it turns away, was the fault in the recipe, the storage, the serving temperature, or something else entirely? A trial run on the fresh product cannot answer those questions on its own, and yet the fresh product is almost always what gets tested.

The market has an answer to some of this, and it is worth reading carefully rather than claiming too much from it. The single-serve pouch and the small tray seal each portion until the meal, so nothing is left opened to sit and change between servings. They do not stop the unopened pack from ageing on the shelf, and they do not settle temperature, product age or how the food is served; what they remove is one large source of variation, the opened pack returned to again and again. But it is a clean case of the one thing this movement is about: that the size and the format of a package, quite apart from its material, shape what the animal finally meets. The format was always a lever, whoever reached for it, and for whatever mix of reasons.

And it brings the oldest problem in this series back from a new direction. We may establish a food's palatability on a freshly opened sample, under carefully controlled conditions, and then let that number stand for a product the household will store, open, reclose and serve across weeks. Some programmes do test aged product, and shelf-life panels exist; the harder question is whether any of it is run the way the pack is actually used. We measured the food under one controlled set of conditions, and let that result stand for all the others.

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Movement V

THE ANIMAL EATS THE SYSTEM

So, after six months, are the two foods still the same? Suppose the analysis finds real differences between them, in a few volatiles, in an oxidation marker, in moisture. Have we shown that one is more palatable than the other? We have not. We have shown that the two changed differently under the conditions we watched. To show a difference the animal cares about, we need the animal, in a study built to ask it, and even then the reading is not simple. A preference might turn on the altered aroma, or the oxidised fat, or the texture, or the moisture, or several at once, and a two-bowl score will not tell us which. It is the lesson of No. 9 and No. 16 arriving together: the number tells us the animal responded differently, not why.

And there is a sharper question underneath the obvious one. When we worry that a package might change the food, are we asking about the effect of the packaging material, the effect of the geometry and the cook it imposed, or the effect of the storage history it creates once it is opened? They are three different studies. The first holds everything else fixed and varies the material: identical batches in different films, one defined storage, the animal asked at matched ages. The second varies the shape, and here is the trap, because changing the geometry usually changes the thermal history with it, so a study that means to isolate the pack's form has to measure the cook it caused and, as far as it can, hold that cook constant or account for it. The third holds the food and the pack fixed and varies the handling: the opening and reclosing and the weeks in a cupboard, the real life of a pack in a house. A package can pass one and fail another. These questions are not always addressed within one validation programme, and answering one does not answer the others. The animal, meanwhile, lives in all three at once.

Which is the real gap, and it is not that packaging is a neglected science; it is a sophisticated one, and so is thermal processing, and so is formulation. The gap is that they are rarely validated as a single system, the recipe and the cook and the package and the weeks of real use, under the conditions a household actually imposes. We prove the barrier, we prove the recipe, and we prove the sterilising cook, each to a high standard, in separate rooms. The animal does not live in any of them.

We formulate the food and we engineer the package, but the animal eats the system.

Return, then, to the two bags opened after six months. Does the animal's verdict now match the one it gave on day 14, in the trial that cleared the food for sale? And if it has moved, can we assign the change to the food ageing on its own, to what the container did to it, or to the two so entangled that no study we ran can part them? The animal will not say. It never separated the recipe from the cook, the food from its package, or the first day from the sixth month; it meets the result of all of them and renders one verdict. Working out what that verdict was about is our job. Perhaps it is time we tested the system the animal actually encounters.

References

1.  Awuah, G.B., Ramaswamy, H.S. & Economides, A. (2007). Thermal processing and quality: principles and overview. Chemical Engineering and Processing: Process Intensification 46(6):584-602. doi:10.1016/j.cep.2006.08.004

2.  Mottram, D.S. (1998). Flavour formation in meat and meat products: a review. Food Chemistry 62(4):415-424. doi:10.1016/S0308-8146(98)00076-4

3.  Watson, P.E., Thomas, D.G., Bermingham, E.N., Schreurs, N.M. & Parker, M.E. (2023). Drivers of palatability for cats and dogs: what it means for pet food development. Animals 13(7):1134. doi:10.3390/ani13071134

4.  Sajilata, M.G., Savitha, K., Singhal, R.S. & Kanetkar, V.R. (2007). Scalping of flavors in packaged foods. Comprehensive Reviews in Food Science and Food Safety 6(1):17-35. doi:10.1111/j.1541-4337.2007.00014.x

5.  Wrona, M. & Nerin, C. (2020). Analytical approaches for analysis of safety of modern food packaging: a review. Molecules 25(3):752. doi:10.3390/molecules25030752

6.  Roudaut, G., Dacremont, C., Valles Pamies, B., Colas, B. & Le Meste, M. (2002). Crispness: a critical review on sensory and material science approaches. Trends in Food Science & Technology 13(6-7):217-227. doi:10.1016/S0924-2244(02)00139-5

7.  Eyre, R., Trehiou, M., Marshall, E., Carvell-Miller, L., Goyon, A. & McGrane, S. (2022). Aging cats prefer warm food. Journal of Veterinary Behavior 47:86-92. doi:10.1016/j.jveb.2021.09.006

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About the Author

Dr. rer. nat. habil. Dr. Seronei Chelulei Cheison is the founder and Chief Executive Officer of Sinonin Biotech GmbH, where he works with petfood companies on palatant sourcing strategies, the innovation of palatability enhancers, and the design of palatability assessment. A trained food enzymologist, he led alternative protein and palatant development at Mars Petcare before founding Sinonin, and his research on protein chemistry spans two decades, a doctorate from Jiangnan University, and a habilitation from the Technical University of Munich.

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Sinonin Biotech GmbH is a partner in the ZEST project (Grant Agreement No. 101157382) and the PROSCALE project (Grant Agreement No. 101288362), both funded by the Circular Bio-based Europe Joint Undertaking (CBE JU) under the European Union's Horizon Europe research and innovation programme. Views and opinions expressed are those of the author only and do not necessarily reflect those of the European Union or CBE JU. Neither the European Union nor the granting authority can be held responsible for them.

What the Carnivore Misses, and What It Minds

What the Carnivore Misses, and What It Minds. An alternative protein may fail not because it lacks protein, but because the food lacks something the animal seeks, contains something it avoids, or both. Two different problems, and reaching for a single palatant answers neither on its own. On why the alternative-protein problem was never a protein problem.

Movement I

THE TWO PROBLEMS

Why would an animal refuse a food that is, on paper, everything it needs? Set down a bowl built on a new protein, a pea, a fungus, a single cell grown in a tank, complete by every nutritional measure and correct in every amino acid, and watch a cat walk away from it. Nothing a label can read is wrong. And yet the animal may be registering two complaints at once, and they are not the same complaint. Something it was listening for is not there. Or something it would rather not meet is. Or both.

Those are the two palatability problems of an alternative protein, and the whole of this Conversation turns on keeping them apart. The first is a problem of subtraction. Meat tends to speak to a carnivore in a particular chemical language, the free amino acids, the nucleotides, the fat and what heat makes of it, and a protein that did not come from an animal often arrives quieter in that language. The food is not offensive. It is simply saying less where the animal expected to be spoken to. The second is a problem of addition. The new ingredient can bring notes of its own that meat did not carry, a bitterness, a green or earthy smell, a texture the mouth was not expecting, and some of these a carnivore may be inclined to refuse. Here the food is not quiet at all. It may be saying the wrong thing.

A food can fail by lacking what the animal seeks, by carrying what it avoids, or both.

The trade, for the most part, treats these as one problem with one solution. Make it more palatable. Add the palatant, lift the score, move on. But a single dial set to one number cannot answer two different complaints, and, as a later movement will show, the motion that addresses one can disturb the other. Subtraction and addition are not two names for the same deficit. They are different problems that happen to arrive in the same bowl.

The cat and the dog do not necessarily hear the same message, and we should resist a tidy law that ranks one as forever the harder judge. Their sensory systems differ, their feeding histories differ, and so does the individual animal at the bowl, shaped by its own experience. It is plausible, and worth testing rather than assuming, that a carnivore with a long evolutionary commitment to meat misses the meat signal more and forgives the off-note less, and that a dog, nearer an omnivore in its history, meets more of it halfway. But that is a hypothesis to put to the bowl, not a settled ranking of the species, and a formulation that succeeds with one animal can still fail the next. The useful rule is narrower: the two problems are real for both species, and which one bites, and how hard, is a question to be asked of each food and each animal, not assumed in advance.

So the question for the rest of this Conversation is not the one the industry usually asks, which of these proteins tastes best. It is a pair of questions, held apart on purpose. What did the animal stop hearing when the meat left? And what did it start hearing that it would rather not? Answer only the first and you may have a worthy, quiet food the animal passes over. Answer only the second and you may have a clean, inoffensive food the animal still has no reason to want. The alternative-protein problem can be either, or both at once, and telling which is where the work begins.

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Movement II

THE MISSING SIGNAL

What, exactly, is the animal listening for? Not protein, as the formulation sheet means it. An animal does not perceive protein, the nutritional category we write down; it perceives what that protein has broken into and what travels with it. Meat, by the time it reaches a mouth, is often rich in free amino acids, the loose savoury fragments that autolysis and ageing have cut from the chains. It can carry nucleotides, the small molecules released as the tissue's own machinery winds down. It carries animal fat and the volatiles that come off it, and the raw material that heat turns into the smell of cooking. Meat is not one flavour. It is a chord, several notes sounded together, and a carnivore has spent its evolution learning some of those notes and moving toward them.

An alternative protein often plays fewer of those notes, though not always, and not all of them. Much of a pea or a legume arrives as intact protein, with less of it cut loose into free amino acids. But the picture is not uniform. A yeast or other microbial biomass can be genuinely rich in nucleotides and free amino acids and other flavour-active compounds, and fermentation and downstream processing can raise or lower them further. Meat, for its part, is not automatically generous with every precursor, and no two animal sources carry quite the same signature. So the honest claim is not that the alternative protein is silent and meat is loud. It is that they are differently composed, and the composition an alternative source arrives with is frequently thinner in exactly the notes a carnivore is most tuned to. The food is often not offensive. It is, often, saying less, and the animal is not recoiling so much as failing to be called.

Meat is a chord, and an alternative protein often plays fewer of its notes.

And the cat reads that chord through an umami system worth describing precisely, because the precise version corrects a common one. In the cat, the receptor that reports savour responds most strongly not to amino acids but to certain nucleotides, the purine nucleotides acting as the agonists that switch it on. Some amino acids then enhance that response, but in the cat they enhance rather than initiate it, and the familiar human favourites, glutamate and aspartate, are not the ones doing the work. It is a particular molecular partnership, nucleotide first and select amino acids second, not a generic appetite for protein. Replace the meat without preserving the balance of nucleotide and amino acid the partnership needs, and you may weaken a specific collaboration the feline umami system is equipped to detect, wherever that balance is or is not supplied.

There is a tempting way to answer all this, and it is a trap the next movements will spring. If the problem is too little free amino acid, break the protein down and free some. If the problem is too little reaction flavour, drive the cooking, or supply the precursors and let the heat work. Each of those moves can genuinely restore part of the missing signal. Each of them, we will see, can create the second problem while solving the first, though whether it does depends on the substrate and the method. For now it is enough to name the quiet precisely, because a deficit named wrongly is answered wrongly.

That is the shape of the subtraction problem, and on its own it is often the more tractable of the two. A worthy, honest, quieter food, passed over not because it offends but because it does not say enough. If that were the only difficulty, the alternative-protein project would be an exercise in putting the missing notes back. It is harder than that, because the same ingredient that went quiet in one register may be speaking up in another.

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Movement III

THE INTRUDING NOTE

What is the alternative protein saying that the animal would rather not hear? Begin with the irony Movement II walked us up to. One way to answer the subtraction problem, to free the savoury amino acids a carnivore reads as meat, is to break the protein down. And breaking the protein down, on a plant or a single-cell substrate, can free more than the savoury fragments. It can expose bitter ones. The short, hydrophobic peptides that hydrolysis lifts out of some proteins taste bitter, at least to a human panel, and the same cut that yields savour can yield them alongside it. The dial we reached for to fill the quiet may, in the same turn, have begun to make a noise.

Bitterness, where an animal does perceive it, is not a flavour to be coaxed away like a preference. It reads closer to a warning, an evolved caution against the alkaloids and toxins that often announce themselves as bitter. That caution is not absolute; concentration, context and learning can all move it. But it is not a mere preference to be coaxed away either. But two honest qualifications belong here. The first is that bitterness does not rise in lockstep with the degree of hydrolysis; where one compound rises another can fall, and some processing continues to cut the protein while lowering the bitterness, which was the whole burden of an earlier Conversation, No. 7, on where to stop the cut. The relationship was charted years ago, largely in dairy proteins, some of that work my own, and it remains only partly charted in the plant, fungal and single-cell substrates the industry is now reaching for. The second qualification is sharper: a peptide that a human panel calls bitter is not thereby proven aversive to a dog or a cat at the concentration it reaches in the finished food. The chemistry of the off-note and the animal's response to it are two separate questions, and this series has no business collapsing them.

A compound a human panel calls bitter is not yet proven aversive to the animal in the bowl.

Bitterness is not the only intruding note, but the others ask for the same care. A legume can carry enzymes that, meeting the plant's own fats, generate green, grassy, beany smells, most notoriously in soybean, though the intensity depends heavily on the raw material and how it was handled. Meat does not smell of cut grass, and an animal may notice the difference even where we have stopped noticing it. Some novel ingredients also arrive wrapped in chitin, the tough material of an insect cuticle or a fungal wall, which can in principle change how a piece breaks and feels in the mouth. But how much chitin, presented in what form, and whether a given cat or dog actually registers it in a finished kibble, are open questions rather than settled facts, and the honest move is to raise them, not assert them.

And there is a distinction worth drawing, provided we draw it as a question and not a verdict. When an animal refuses a new food, is it refusing because the food is genuinely aversive to it, or only because the food is unfamiliar? The two can look identical at the first meeting and diverge by the tenth, because an unfamiliar but harmless food is often accepted over repeated, unpressured exposures, while a genuinely aversive one may not be. Dogs have been seen to hesitate and eat more slowly when first met with a novel diet; cats' preferences are known to be shaped by experience. But the line is not clean. An aversion can soften with exposure, and an unfamiliarity can prove stubborn, so the question is not which fixed category a refusal belongs to but which way it is moving, and whether anyone watched it long enough to know. An instrument that scores a single first encounter, and much of the industry's testing does exactly that, cannot see which way the refusal was heading.

Getting this wrong is expensive in both directions. Read an unfamiliarity as an aversion and you abandon a food the animal would have grown into. Read an aversion as mere unfamiliarity and you keep presenting a food that was never going to win, waiting out a refusal that was not fading. So the addition problem is really a cluster of them, chemical and perceptual and temporal at once, and only some of it is yours to engineer. Which raises the question the next movement must face, carefully: when is the cure for one problem bound to the cause of the other, and when is it not?

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Movement IV

WHEN ONE MOVE CHANGES THE OTHER

Why not simply do both, then, fill the quiet and remove the intrusion, and meet the animal in the middle? Sometimes you can. That is the correction this movement exists to make, because the tempting story, that every gain in signal buys an equal loss to noise, is too tidy to be true. The real situation is both better and more demanding. The two problems are sometimes coupled, so that the same change moves both, and sometimes they are not, so that a well-chosen change can move one and leave the other largely alone. The difficulty is not that improvement is impossible. It is that we cannot assume a change improves only the thing we aimed it at.

When are they coupled? When the signal and the off-note are made by the same event. The hydrolysis that frees a savoury fragment and the one that exposes a bitter peptide can be, at that moment, the same cut, and asking it for more of the first will sometimes bring more of the second. The reaction that builds a cooked, meaty aroma and the one that builds a scorched or bitter note are the same chemistry run to different extents. Where the same step generates both the wanted and the unwanted, asking for more of one may move the other, and whether that trade-off can be dodged depends on the reaction pathway and the control you have over it. Assume it never can, and you resign yourself to worse food than the chemistry required.

There is more than one dial, and they do not all move signal and noise together.

But coupling is not the law of the whole field, only of certain moves within it. Change the substrate and the balance of savoury to bitter fragments changes with it. Stop the cut at a different point, as No. 7 argued, and the same protein yields a different mixture. The point is not to list the levers here, and I will not, but to correct the fatalism: there is more than one dial, the dials do not all move signal and noise together, and part of the craft is knowing which are coupled on a given substrate and which can be worked apart. That knowledge is specific, hard-won and, frankly, the asset, so this essay will say plainly that the decoupling exists without saying how it is done.

Masking deserves its own caution, because it is the move the trade reaches for most and the one least likely to decouple anything. To lay a louder flavour over an off-note is not to remove the off-note, nor to restore the quiet true signal underneath; it is to add a third thing on top of both. Sometimes it works well enough to sell. But a precise feeder, and some animals are more precise than others, may read the whole stack as wrong rather than be won by it, and the underlying problem, signal too faint or noise too present, is still there beneath the cover. Masking can buy acceptance. It rarely buys a solution.

So the honest shape of the hard problem is not one cruel dial but a question that has to be answered before any dial is touched: for this food, on this substrate, are the two problems coupled or not, and which of them is actually present? That question has no single answer, and it is narrower and more useful than the industry's reflex, which is to turn up the palatant and hope. It returns us, for the last movement, to the only instrument that finally rules, the animal, and to what its verdict can and cannot tell us about which problem we were ever solving.

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Movement V

WHAT THE ANIMAL IS ACTUALLY JUDGING

What is the animal actually judging, when it lowers its head to the bowl or turns away from it? Not the protein, in the sense the formulation sheet means. It does not judge a nutritional category; it judges a food, and it renders on each food a single verdict that folds everything together, the signal and the noise, the savoury and the bitter, the familiar and the strange, into one decision with no partial credit. It does not eat the half we got right and leave the half we got wrong. It eats, or it does not.

That is the quiet reproach buried in this whole subject. We filed the alternative protein under protein, in the protein plans and the protein targets and the protein press, and all the while the animal was not judging the protein. It was judging the taste, the smell and the feel of a food, which is to say it was judging palatability, and palatability does not sit in the protein department. The problem we named for its most expensive ingredient was, in good part, a problem of the senses. We put it in the wrong room, and then wondered why the tools in that room did not fix it.

An animal never judged a protein. It only ever judged a food.

Seen from the bowl, the use of the two-problem distinction is finally plain, and it is diagnostic, not merely descriptive. A low palatability score tells us only that the animal responded differently. It does not tell us why. Several quite different faults produce the same low number: too little of the signal the animal seeks, too much of the note it avoids, a food merely unfamiliar, or some interaction among these. A two-bowl preference ratio cannot tell them apart, and No. 9 asked what lies beyond that bowl for exactly this reason. Yet the remedy for each is different, and some remedies make the others worse. So the first discipline this Conversation asks for is cheap and almost never practised: before you reach for more palatant, find out which problem you actually have.

A low palatability score tells us the animal responded differently. It does not tell us why.

Each of these faults deserves its own return, and some we have visited before, the fat of No. 4, the meat chemistry of No. 2 and No. 3, the cut of No. 7. The Fridays ahead go back to them not as unopened subjects but as open diagnostic questions: not only what the missing signal is, but how to know when it is what is missing; not only whether a cut can turn savour bitter, but when it must and when it need not. The unfamiliar and the aversive most of all deserve to be told apart properly, because an industry that cannot distinguish them is measuring the wrong thing. And a food grown in a tank is already posing the whole question in miniature, signal and noise and novelty at once.

For now, the first and largest thing is only to hold the problem the right way round. We kept calling it a protein problem and reaching for protein's tools. The animal kept answering the question it was actually asked, which was never about the protein as a category at all. It was about the food. It is always, only, about the food.

References

1.  Bradshaw, J.W.S. (2006). The evolutionary basis for the feeding behavior of domestic dogs (Canis familiaris) and cats (Felis catus). Journal of Nutrition 136(7):1927S-1931S. doi:10.1093/jn/136.7.1927S

2.  McGrane, S.J., Gibbs, M., Hernangomez de Alvaro, C., Dunlop, N., Winnig, M., Klebansky, B. & Waller, D. (2023). Umami taste perception and preferences of the domestic cat (Felis catus), an obligate carnivore. Chemical Senses 48:bjad026. doi:10.1093/chemse/bjad026

3.  Zoran, D.L. (2002). The carnivore connection to nutrition in cats. Journal of the American Veterinary Medical Association 221(11):1559-1567. doi:10.2460/javma.2002.221.1559

4.  Saha, B.C. & Hayashi, K. (2001). Debittering of protein hydrolyzates. Biotechnology Advances 19(5):355-370. doi:10.1016/S0734-9750(01)00070-2

5.  Rackis, J.J., Honig, D.H., Sessa, D.J. & Steggerda, F.R. (1970). Flavor and flatulence factors in soybean protein products. Journal of Agricultural and Food Chemistry 18(6):977-982. doi:10.1021/jf60172a026

6.  Callon, M.C., Cargo-Froom, C., DeVries, T.J. & Shoveller, A.K. (2017). Canine food preference assessment of animal and vegetable ingredient-based diets using single-pan tests and behavioral observation. Frontiers in Veterinary Science 4:154. doi:10.3389/fvets.2017.00154

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About the Author

Dr. rer. nat. habil. Dr. Seronei Chelulei Cheison is the founder and Chief Executive Officer of Sinonin Biotech GmbH, where he works with petfood companies on palatant sourcing strategies, the innovation of palatability enhancers, and the design of palatability assessment. A trained food enzymologist, he led alternative protein and palatant development at Mars Petcare before founding Sinonin, and his research on protein chemistry spans two decades, a doctorate from Jiangnan University, and a habilitation from the Technical University of Munich.

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Sinonin Biotech GmbH is a partner in the ZEST project (Grant Agreement No. 101157382) and the PROSCALE project (Grant Agreement No. 101288362), both funded by the Circular Bio-based Europe Joint Undertaking (CBE JU) under the European Union's Horizon Europe research and innovation programme. Views and opinions expressed are those of the author only and do not necessarily reflect those of the European Union or CBE JU. Neither the European Union nor the granting authority can be held responsible for them.

Why Is Africa Still Importing the Protein It Could Make?

Essays & Op-Eds · Protein · Africa

Africa is not short of protein resources. It is short of protein industrialisation.

By Dr. rer. nat. habil. Dr. Seronei Chelulei Cheison3 November 2026

Why does a continent this rich in biomass import its protein?

Why does a Kenyan feed miller buy soybean meal from Zambia, while market refuse, abattoir offal and crop residues rot down the road? Why does a continent with the youngest workforce on earth import fishmeal it could replace with insects? And why does the global debate on sustainable protein take place in Brussels, Washington and Singapore, when the decisive battle will be fought in Nairobi, Lagos and Addis Ababa?

Here is my answer, and I offer it as a provocation.

Africa is not short of protein resources. It is short of protein industrialisation.

I grew up a herdsboy in Nandi, walking cattle to water before school. Today I am a food scientist and biotech entrepreneur in Germany, and I still farm in Kenya. I have seen the protein question from the boma at dawn and from the fermentation hall in Europe. From both ends, the conclusion is the same: Africa is the least prepared arena in the most important food contest of the century.

Is this about hunger, or about industry?

Let me be precise, because the lament is easy and mostly wrong. The United Nations projects Africa's population to rise from about 1.5 billion in 2024 to almost 2.47 billion by 2050. Africa's average protein supply, about 69 grams a head a day in FAO-derived food balance figures, is the lowest of any region. That is supply, not measured intake, and the average conceals wide differences in access, quality and price. The challenge is not simply producing more protein; it is making nutritionally adequate protein available, affordable and accessible to the people who need it. Recorded meat supply is under ten kilograms a head a year, yet a World Bank, FAO, ILRI and AU-IBAR study projected Africa's total meat consumption rising from 10.5 million tonnes in 2005/07 to almost 35 million by 2050.

Where quality falls short, children pay. Africa is the only region where the number of stunted children has grown since 2012, from 61.7 million to 64.8 million, according to UNICEF, the WHO and the World Bank. Stunting has many causes, from infection to sanitation, and protein is only one of them. But the demand is coming either way.

So this is not a lament about protein hunger. It is a question about who will make the protein Africa is about to eat: African factories, or someone else's.

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Why does the money look away?

Ask any Kenyan poultry keeper what decides whether the year is profitable. Not the bird: the feed bag. Feed millers put soybean meal at 16 to 22% of a poultry ration, alongside fishmeal. Kenya grows little soya, sunflower or cotton, so it buys protein cake from Uganda, Malawi, Zambia and Tanzania. When Zambia suspended exports of soya and sunflower meal in 2021, Kenyan feed costs hit record highs and soya doubled in price. Is that food security, or a dependency we have chosen not to see?

Then look at the capital. Alternative-protein investment worldwide has fallen for four straight years. The Good Food Institute counts US$881 million raised in 2025, the first year below a billion since 2018. European companies took US$418 million and North American ones US$347 million. What did Africa get? Not enough to register in the headline figures.

Oxford's TABLE programme found that most European and North American funds regard sub-Saharan Africa as too risky for alternative protein. A handful of mission-driven investors are, in practice, the only door open to African founders. Sub-Saharan Africa received about 1% of global agricultural credit in 2019. Development finance still pours into conventional livestock, as if the West's twentieth-century protein model were the only one on offer. Who decided that?

And why must a Kenyan entrepreneur rearing black soldier fly larvae collect separate approvals from KEBS, NEMA and KEPHIS for each product? Each agency has a legitimate mandate: standards, environment, plant health. The complaint an ILRI workshop heard in 2025 was not that they exist, but that they act in sequence rather than together. Three agencies queuing at one larva is not a framework. It is an unnecessary tollgate.

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What does Africa have that Europe must buy?

A frontier is defined by what has not yet been built. By that measure, Africa holds several cards that industrialised competitors cannot easily replicate.

It has room. The African Development Bank reckons the continent holds about 65% of the world's remaining uncultivated arable land. Europe is arguing over how to shrink its livestock on land long since spoken for. The figure is contested, and much of that land is better left wild. But Africa can still choose how its land is used, instead of inheriting the choice.

It has feedstock, and it is lying in the open. FAO and the World Bank have put post-harvest grain losses in sub-Saharan Africa at about US$4 billion a year. Kenya's own Livestock Principal Secretary told feed manufacturers in 2024 that about 46% of the livestock feed Kenya produces, most of it fodder and forage, is lost after harvest. Add tea waste, brewery spent grain, bagasse, fruit pulp from export packhouses, abattoir by-products and the refuse of markets in Nairobi and every county town. What Europe calls a sidestream and pays to collect, Africa still calls rubbish and frowns at it. Insects, fungi and fermentation turn that rubbish into protein. My partners and I do exactly this in Europe, in the EU-funded ZEST and PROSCALE projects. Not every residue is idle, mind: dairy farmers already buy brewers' grain, and crop residues feed soils and stoves. A protein industry earns its place only where it adds value, not where it merely outbids the cow.

It has a head start in law. In 2017 Kenya adopted KS 2711, drafted in 2016, a national standard for insect products in compound feed, and in 2020 standards for rearing and edible insects. These were among the first such standards anywhere. ICIPE trained more than 200 small enterprises and 3,000 farmers in black soldier fly rearing. Over 85% of Kenyan feed producers it surveyed said they would use insect meal. In 2025 IFAD and Kenya's aquaculture programme announced more than 500 youth-led black soldier fly units. That is an industry being born from the bottom up, on waste, by the young.

And it has the right first market. A feed miller does not ask whether a protein is natural; he asks for its amino-acid profile, its digestibility and its price per tonne. Feed and petfood buy protein on specification, not sentiment. That makes them the fastest route to scale for novel protein. It is also exactly where Africa's import dependence hurts most.

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Is the sun worth more than a subsidy?

In Europe, the weather is a line item. From 2026 to 2028 Germany will compensate eligible energy- and trade-intensive firms for part of their electricity costs, under a scheme pegged to about five cents a kilowatt-hour; an insect or algae start-up is unlikely to qualify. Kenya's climate gives away part of what that money buys: warmth and light. It will not mill, aerate or dry for you. Two protein routes show how.

Parameter	Germany	Kenya	Consequence
Black soldier fly larvae: approximate optimum for growth	27–30 °C	27–30 °C	Same biology; only the cost of providing it differs
Ambient temperature	January means of roughly 0–3 °C; summer heatwaves above 30 °C	Mild in the highlands, with cool nights; warm and humid in the lowlands	Germany heats for months and cools in summer; Kenya trims, ventilates and dries
Spirulina: growth range	Optimum about 30–35 °C for common strains; little growth below 20 °C	Same	Heated greenhouses or closed reactors in Europe for much of the year
Sunlight	About 2.5–3.3 kWh/m² a day on annual average; about 0.5 in December against 6.4 in June	About 6 kWh/m² a day or more over most of the country, with little seasonal swing	Europe buys light in winter; Kenya receives it
Day length	About 8 hours in midwinter, 16 in midsummer	About 12 hours, all year	A stable photoperiod for algae growth and fly mating

Why does a German insect farm pay twice?

Black soldier fly larvae grow fastest at roughly 27 to 30 °C, and what matters is the temperature of the feeding substrate, not merely of the room. At 36 °C survival collapses; at 20 °C growth crawls. In a German winter, halls must be held near 28 °C while it freezes outside, sometimes down to minus 20 °C. In a German summer the bill comes again, because dense larval masses generate their own heat, enough in mass rearing to overheat and kill the larvae if it is not drawn off. The farmer pays to heat in January and to cool in July. Adult flies mate only under light, so breeding rooms are lit year-round. Energy and climate control are routinely named among the heaviest running costs of European insect farms.

The market has delivered its verdict. Enorm Biofactory in Denmark, once Northern Europe's largest insect farm, was declared bankrupt in October 2025, with energy and climate control among its burdens. Second-generation European ventures are moving to Andalusia for the sun. Why stop in Spain?

Kenya is no paradise, and I will not pretend otherwise. The Nandi Highlands are cool at night, so larvae there still need some heating after dark. Lowland heat demands ventilation. Humidity complicates drying, and the long rains make solar drying unreliable. Africa also has its failures: South Africa's AgriProtein collapsed in 2021 after raising more than US$100 million, and Inseco shut down in 2025, undone in part by power cuts. Climate is an advantage; it is not a business plan.

Why light a pond in Hamburg when the equator is free?

Spirulina is roughly 60% protein by dry weight. It grows best between 30 and 35 °C and needs 10 to 14 hours of good light a day. A commercial producer in sunny Portugal records winter output more than 60% below summer. A northern European producer who wants year-round output must heat the culture and light it with LEDs, or accept a lean winter. Dutch growers are now building fully indoor, daylight-free systems. Kenya sits on the equator. Arthrospira, the cyanobacterium sold as spirulina, blooms naturally in the alkaline soda lakes of Kenya's Rift Valley, such as Nakuru and Bogoria, where it feeds the flamingos. Yet Kenya imports spirulina from Asia. What irony!

Sunlight is free. Converting it into saleable protein is not. Too much sun can stall growth, open ponds evaporate scarce water, and harvesting and drying cost energy anywhere. Algae grown in the dark on sugars, in fermenters, gain nothing from Kenya's sunshine at all.

So the honest test is not Germany versus Kenya. It is a specific German plant against a specific Kenyan plant, run for a full year to the same specification, measured by total annual energy cost per kilogram of saleable, specification-compliant protein. On that measure, I am willing to bet on Kenya. Is anyone willing to fund the test?

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Too theoretical? Come to Chebole, Bomet and Kipkenda, Nandi.

In 2022 Hyvene Kirui, a trained secondary-school teacher, turned to farming on less than an acre at Chebole in Bomet County. In 2023 her farm became the first project I supported through WIDU.africa, the German diaspora grant programme. Today it carries poultry, including ornamental birds, organic vegetables, Dorper sheep, pigs and dairy. Eight 550-watt panels, 4.4 kWp of peak capacity, charge a 5 kWh battery that runs all her lighting and water pumping. A biogas digester supplies backup energy. Black soldier fly larvae and Azolla, a nitrogen-fixing water fern, supplement the rations of her poultry and sheep. Frass and digester slurry go back to the soil as organic fertiliser. On less than an acre, she employs herself and five others.

My own farm, Kipkenda Poultry in Nandi County, makes the same point at a larger scale. Sixteen 500-watt panels, 8 kWp of peak capacity, charge two 10 kWh lithium batteries. They run everything: brooder heating, lighting, security cameras, an incubator that hatches 1,056 eggs at a time, and the machinery that processes our own poultry feed. Beside the poultry houses, 100 square metres of Azolla grow a green protein supplement for the flock.

Heating chicks, milling feed and running an incubator day and night are the very loads a European farmer pays dearly for each winter. In Bomet and Nandi, the sun pays. What Europe models in strategy papers, a Bomet schoolteacher is already doing. So why are there not ten thousand of her?

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If the grid is green, why is the power so dear?

Kenya draws about four-fifths of its electricity from renewables, and in the year to June 2026 geothermal from the Rift Valley alone supplied about 41%. Germany managed 55% in 2025. So why does a Kenyan factory pay more for power than many of its competitors?

Because renewable does not mean cheap. The Kenya Association of Manufacturers puts industrial power at 18 to 23 US cents a kilowatt-hour, and KIPPRA, the government's own think-tank, finds Kenyan industry paying about twice what China's pays. Uganda has cut rates for large manufacturers to about a third of Kenya's. Monthly fuel and foreign-exchange surcharges add volatility on top. A tariff built on cheap geothermal steam and then loaded with charges is a policy choice, not a law of physics.

The opening lies in heat. Geothermal steam is not free: wells, maintenance, reinjection and pipework must all be paid for. But it has no fuel bill, and fermentation, drying and rendering need heat as much as electricity. A protein plant at Olkaria could tap geothermal process heat at costs and carbon intensities that many European competitors would struggle to match. That is worth proving plant by plant, because a geothermal field does not guarantee cheap heat until someone signs a contract for it.

Factor	Kenya	Germany
Industrial electricity	US$0.18–0.23 per kWh (KAM, 2026)	about €0.16 per kWh without relief, €0.10 with; compensation pegged to about €0.05 for eligible energy- and trade-intensive firms, 2026–2028
Renewable share of electricity	about 80% (EPRA, 2025)	55.1% (UBA, 2025)
Statutory minimum wage, monthly	KSh 18,047, about US$139, general labourer in the five cities (2026)	€2,409 gross (2026)
Average bank lending rate	14.3% (CBK, July 2026)	far lower
Median age	19.3 years (Africa)	42.8 years (Europe)

Is cheap labour a strategy, or an insult?

A Nairobi labourer's legal minimum is about US$139 a month; Germany's is €2,409. Kenyan technical colleges enrolled 825,484 students in 2025, and universities hundreds of thousands more. It is tempting to sell Africa on cheap, plentiful hands.

Resist it. A biotech plant runs on fermentation technicians, process engineers, microbiologists, analysts and maintenance crews. The measure that matters is not the wage but total labour cost per kilogram of specification-compliant product. A German plant with high salaries, automation and steady uptime can beat a Kenyan plant with more staff, lower yields and frequent breakdowns. A Kenyan plant with skilled, well-paid technicians and high utilisation can beat them both.

That should be the ambition: decent, sustainable jobs, not cheap jobs. Kenya created about 822,000 jobs in 2025, and nearly nine in ten were informal. A protein industry that offered formal contracts, safe plants, training and careers would do more for the young than any wage advantage. An industry that depends on low pay cannot call itself sustainable. Otherwise it is a sweatshop with a sustainability report.

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What does a 15% loan do to a good idea?

It can kill it. Take a hypothetical €10 million protein plant. Financed at 6%, it pays €600,000 in first-year interest. At 15%, it pays €1.5 million. The €900,000 gap can wipe out every saving that sunshine and wages provide. These are illustrative rates, not quotations, but Kenya's commercial lending averaged 14.3% in July 2026, with the central bank rate at 8.75%. Some argue that heavy government borrowing at home crowds out private lending. I leave that debate to the economists.

Why is money so dear? Public debt stands near 68% of GDP, and debt service is consuming about 72% of ordinary revenue in 2025/26, with nearly 80% projected for 2026/27. The Treasury hunts for revenue through each year's Finance Act, and investors never know which tax will move next. The World Bank's November 2025 Kenya Economic Update found Kenya's regulation more restrictive to competition, deterring private investment. The US Trade Representative's 2026 trade-barriers report flags bribery in public procurement. Add imported equipment, freight, currency swings and spare parts that take months to arrive. The true cost of a Kenyan protein plant is far above its interest rate.

Development finance, concessional loans, equipment leasing and public–private partnerships can close part of that gap. But let me be equally blunt with my own side: cheap money must not be used to disguise an uncompetitive plant. The only number that settles the argument is the landed cost:

Landed cost = feedstock + energy + labour + capital recovery + maintenance + quality assurance + compliance + packaging + logistics + risk allowance.

Does shipping kill the carbon case?

Not necessarily. A kilogram of protein made on a geothermal grid, from local waste, for a local feed mill, may well carry lower emissions than soybean meal grown on cleared land in South America and shipped to Mombasa. That is a hypothesis worth testing, not a result I can yet claim. For a shelf-stable ingredient sent to Hamburg by sea, freight may be a modest share of the total footprint.

But "should" and "may" are not evidence. EPRA reported that Kenya's grid emission factor rose about 18% in the second half of 2025 as thermal generation climbed, and imports now supply around 12% of electricity. The proper measure is kilograms of CO₂-equivalent per kilogram of specification-compliant, digestible protein delivered to the customer, assessed to ISO 14040 and 14044 against the German alternative. Europe demands that proof. Kenya should welcome the test, and invest in the conditions required to pass it.

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Where should Kenya build what?

Why does every county want a special economic zone, and almost none a specialisation? Kenya should not chase every protein technology everywhere. It should put each where the resources, utilities and buyers already are.

Location	What belongs there	What must be proven
Nairobi–Athi River	Fermentation, hydrolysates, ingredient formulation, analytical services; De Heus opened a 200,000-tonne feed mill here in 2026	Land and utility costs; maintaining sophisticated plant
Naivasha (Olkaria)	Geothermal-linked fermentation, drying and integrated biorefineries in the special economic zone	Delivered heat and power prices; water; contracts, not maps
Eldoret–Nandi	Insect protein, feed ingredients, farmer-linked circular enterprises; tea and maize sidestreams	Feedstock aggregation; cool highland nights in BSF models
Mombasa	Export consolidation, storage and packing at the port	Port handling, clearance and inland freight in the landed cost

The export doors are already open. Since 1 July 2024 the EU–Kenya Economic Partnership Agreement has given every Kenyan export, arms excepted, duty-free and quota-free entry to the European Union. AGOA, reauthorised in February 2026, was extended in September 2026 to December 2028. Mombasa is the gateway to Uganda, Rwanda, South Sudan and eastern Congo.

But is an open door a market? Duty-free is not the same as access: feed and petfood bound for Europe must still clear EU rules on animal by-products, feed hygiene and approved establishments. And Mombasa's flagship Dongo Kundu zone, conceived more than twenty years ago on some 3,000 acres, had drawn only two major private investors by August 2026, held back by missing roads, water and power. Kenya does not lack plans. It lacks finished infrastructure.

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Is the law an asset or a tollgate?

Biology does not confer a licence. A larva that can eat something does not make that thing a legal feed. The European Union allowed insect protein in aquafeed in 2017 (Regulation 2017/893) and in pig and poultry feed in 2021 (Regulation 2021/1372). It still forbids feeding insects on catering waste, manure or meat-and-bone meal. A Kenyan plant that wants to sell to Europe must, therefore, give up the cheapest substrates, meet EU feed-hygiene and animal-by-product rules, and qualify as an approved establishment. A product that is lawful in Nairobi is not automatically lawful in Hamburg.

Algae have their own maze. Spirulina was on the European market before 1997 and needs no novel-food approval; other species and processes may. Classify the product before you build the plant, not after.

And let no one mistake weak regulation for a friendly business climate. Lax safety rules destroy consumer trust, close export markets and create liabilities that outlive the founders. Kenya's opportunity is to offer regulation that is science-based, fast and compatible with its export markets. Predictability is an investment incentive that costs the Treasury nothing.

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Is it all rosy? An honest SWOT

No. A reader who has been sold Africa before deserves the weaknesses beside the strengths. Note where they cluster: not in biology, but in the systems needed to industrialise it.

SStrengthsInternal · helpful

A young, increasingly technical workforce

Abundant, largely unused sidestreams

A largely renewable grid with geothermal heat

A climate suited to insects and phototrophic algae

A strong research base (icipe, ILRI, universities) and agricultural export experience

Legal National insect standards among the world's first (KS 2711, 2017; KS 2921 and KS 2922, 2020)

WWeaknessesInternal · harmful

Industrial power that is green but not cheap

Expensive, short-tenor capital and imported equipment

Inconsistent feedstock quality and aggregation

Few pilot and scale-up facilities

Legal Approvals split across KEBS, NEMA and KEPHIS; no clear pathway yet for fermentation-derived or algal feed protein; standards not harmonised across the EAC

OOpportunitiesExternal · helpful

The fastest-growing protein demand on earth

Import substitution for soybean meal and fishmeal

Feed and petfood as specification-driven entry markets

Higher-value exports: hydrolysates, palatants, specialty proteins

EU buyers seeking low-carbon, deforestation-free protein

Legal EU–Kenya EPA; EU approval of insect protein in fish feed (2017) and pig and poultry feed (2021); spirulina's established EU status

TThreatsExternal · harmful

A four-year retreat of global alt-protein capital

Currency swings, drought and water stress

Established foreign competitors and cheap imports

A safety failure that taints the whole sector

Dependence on foreign technology and IP

Legal EU bans on catering waste and manure as insect feed; EU establishment rules; AGOA's annual review; abrupt tax and court reversals

SWOT: Kenya's sustainable-protein industry. Strengths and weaknesses are internal; opportunities and threats are external.

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What does an investor actually see? A PESTEL scan

The SWOT looks inward, at what Africa and Kenya bring. The PESTEL looks at the weather outside the factory gate. Read it row by row and one pattern stands out: several of the most consequential constraints are institutional, financial and regulatory, and therefore open to deliberate reform. Water, distance and biology are not; finance, permits and tariffs are.

PPolitical

Tax protests in 2024, fuel-price unrest in 2026, a general election due in August 2027; AGOA under annual US review

So Plan for disruption; never rely on one trade window

EEconomic

Debt near 68% of GDP; debt service above 70% of revenue; lending at 14.3%; no IMF programme since early 2025

So Expect tax pressure and dear credit; seek blended finance and hard-currency offtake

SSocial

Median age about 19; TVET enrolment above 800,000 in 2025; most new jobs informal

So A ready workforce and a hunger for formal careers; build training into the business

TTechnological

Strong research base (icipe, ILRI, universities); almost no shared pilot fermentation capacity

So The lab-to-plant gap is the bottleneck; a shared pilot plant would unlock a cluster

EEnvironmental

About 80% renewable power but a rising thermal share; drought; water stress; large post-harvest losses

So Low-carbon claims are possible but must be measured; secure diverse feedstocks

LLegal

Early insect standards; fragmented permits; EU export rules; volatile Finance Acts

So Treat regulation as part of industrial strategy, not an afterthought

The verdict. Kenya has the biology, the talent and the research base to build a competitive sustainable-protein industry. Whether it succeeds depends on finance, infrastructure, regulatory predictability and measured performance.

PESTEL: the operating environment for a Kenyan protein plant.

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Are the SDGs a balance sheet or a brochure?

How many glossy reports have you read that tick five Sustainable Development Goals and measure none of them? Sidestream protein can serve several goals at once. But a claim counts only if it comes with a number, so here are the numbers to be held to.

Goal	Kenyan baseline	Indicator to report
SDG 2: Zero hunger	64.8 million stunted children in Africa, the only region where the number is rising	Cost per kilogram of digestible feed protein; price and household consumption of eggs, fish, milk and meat
SDG 8: Decent work	Nearly nine in ten new jobs in 2025 were informal	Formal jobs created, wage adequacy, safety record, women and young people employed
SDG 12: Responsible production	About 46% of the feed Kenya produces is lost after harvest	Share of incoming feedstock converted into saleable products, from a full material balance
SDG 14: Life below water	An estimated 60–80% of Lake Victoria's omena catch goes to animal feed	Tonnes of fishmeal displaced, with catch and stock indicators for the source fisheries
SDG 7 and SDG 13: Energy and climate	About 80% renewable power; a national target of a 35% emissions cut by 2035	kg CO₂e and kWh per kg of saleable product; litres of fresh water per kg
SDG 9 and SDG 17: Industry and partnership	Almost no shared pilot capacity; strong research partners in Europe	Local value added, technologies commercialised, intellectual property owned in Kenya

Is a job enough?

SDG 8 does not ask for jobs. It asks for decent work: safe, formal, fairly paid and skilled. Counting heads without counting quality is how development reports flatter themselves. A protein plant will not employ millions, but it can create the technician and laboratory careers a TVET graduate can build a life on, far from Nairobi. It can lift the incomes of the women who dry omena and ochonga and the smallholders who sell crop residues by giving them a buyer with a contract and a quality premium. Hyvene Kirui's farm shows the effect: six livelihoods on less than an acre, sustained by sunlight, insects and waste, sorry, sidestreams.

Can anything be zero waste?

Zero waste is a legitimate engineering ambition, not an automatic property of circular production. A black soldier fly unit fed on brewery grain can yield protein meal, insect oil, frass for treated soil use and, where it pays, chitin; every output needs processing, a safety assessment and a buyer. A spirulina pond can absorb CO₂ from fermentation. Very little in such a cascade need be discarded, though some residues and treatment losses always remain. But a zero-waste claim requires a material balance that shows what enters, what is sold, what is recovered and what remains. It also requires safety: circularity is no excuse for feeding contaminated substrate into the food chain. The honest goal is to maximise safe, profitable recovery, not to process waste at any cost.

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Is a kilogram of protein a kilogram of protein?

No, and this is where most of the alternative-protein debate goes wrong. A laboratory report that says "55% crude protein" tells a buyer almost nothing about what he is paying for. Crude protein is nitrogen multiplied by a factor. Value lies elsewhere.

It lies in the amino-acid profile: does the meal supply the lysine and methionine a broiler cannot make for itself? It lies in digestibility: how much of that nitrogen does the animal actually absorb? It lies in anti-nutritional factors, consistency from batch to batch, and safety. In petfood, it also lies in palatability, because a dog or cat that refuses the bowl renders every nutritional claim irrelevant. And in human food it lies in functionality: solubility, foaming, emulsification and taste.

Two meals with the same crude protein can differ widely in price, because they differ in what they do. That is why I spend my working life on petfood ingredients and palatants rather than on bulk meal. A hydrolysate tailored to a customer's specification commands a premium that an undifferentiated tonne never will.

The lesson for Africa is blunt. Sell specifications, not tonnes. A continent that exports crude protein will be paid like a supplier of raw materials. A continent that sells digestibility, amino-acid balance and palatability will be paid like an industry.

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Where should Kenya begin?

Not everywhere at once. The surest way to waste a frontier is to chase every technology on it.

The first phase is the home market. Insect protein, selected plant proteins and by-product processing should supply Kenya's own poultry, fish and pig farms. Kenya needs about 55 million tonnes of livestock feed a year by dry matter and produces only about 40% of it; roughly 400 millers make 2.5 million tonnes of compound feed. In July 2026 the government announced a ten-year National Feed Strategy valued at about KSh 465 billion, still being prepared rather than funded. Domestic demand is large enough to build an industry on before anyone ships a tonne abroad.

The second phase is shared regional hubs: pilot plants, analytical laboratories, quality assurance and training, sited where the feedstock, utilities and buyers are. No start-up should have to build its own pilot plant.

The third phase is export of higher-value ingredients: hydrolysates, functional proteins, fermentation products and petfood palatants. Kenya's own petfood market is small, about 2,568 tonnes in 2022, but sheltered by a 35% tariff and growing with urban pet ownership. Margins abroad are better than in bulk meal.

Keep the two markets apart. Replacing imported feed ingredients at home is about cheaper eggs, fish, milk and meat for Kenyans; that is where the nutrition dividend lies. Exporting hydrolysates and palatants is about margins and skilled jobs; its effect on the Kenyan plate is indirect. Both matter, but they are different businesses and need different policies.

The fourth phase is ownership. Kenyan firms must take part in process development, equipment adaptation, formulation, intellectual property and international marketing. Otherwise Africa will supply the waste while others capture the value, as it has with cocoa, coffee and tea.

What should be demanded, and of whom?

Of Nairobi: count protein the way you count maize, with a national protein balance sheet that includes livestock and pets. Write novel and sidestream protein into the National Feed Strategy, with targets for replacing imported soybean meal and fishmeal. Replace three regulators with one licence for insect, fungal, algal and fermentation protein, recognised across the East African Community. And make the Naivasha zone a protein cluster, with a guaranteed industrial tariff, direct geothermal heat and a shared pilot plant open to start-ups and universities.

Of the development financiers: stop treating alternative protein as a luxury for rich consumers. It is import substitution, waste management, youth employment and child nutrition in a single investment line. Shift a modest share of the capital now committed to conventional livestock into sidestream-protein plants beside breweries, tea factories, abattoirs and markets.

Of Brussels and Berlin: treat Africa as a partner in this transition, not a market for it. This is not an argument for relocating European plants to lower-wage countries. It is an argument for joint development: research in both places, pilot plants that test the same process under both climates, manufacturing sited where it is demonstrably cheapest and cleanest, and African ownership of a share of the technology. Research programmes on sidestream protein should include African partners and pilot sites by design, not as a line in the dissemination plan.

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So, can Kenya land a kilogram in Hamburg?

Africa skipped the landline and went straight to mobile money; the world now studies that leap. Must it now copy the North's path of imported soya, confined livestock and the long, expensive retreat that follows? Or can it build a protein economy that runs on its own sunlight and its own sidestreams from the start?

The advantages I have described are real, and so are the traps. A climate advantage disappears in an inefficient plant. A wage advantage disappears with low productivity. A carbon advantage disappears with poor design or careless logistics. Africa does not need another flattering narrative about its potential. It needs an industrial strategy that survives an audit.

So here is the test I put to every minister, financier and fellow scientist who reads this:

Can Kenya manufacture a kilogram of sustainable protein, deliver it to Hamburg at a competitive price, prove a lower footprint, and create decent jobs doing it?

If the answer is yes for a given technology, it is an opportunity worth funding now. If the answer is no, the analysis must tell us why, and what investment, technology or policy would change it. That is how a frontier becomes an economy.

When I drove cattle as a boy, the elders measured a man's wealth by his herd. The next generation may measure a county's wealth by something less visible: how much protein it can make from what it once threw away. The frontier is open. Will Africans settle it, or will we once again import the finished product of someone else's ingenuity?

Dr. rer. nat. habil. Dr. Seronei Chelulei Cheison is a food scientist and the founder and CEO of Sinonin Biotech GmbH, which develops alternative proteins for petfood. He farms in Nandi County, Kenya, where he runs Kipkenda Poultry. He leads Work Package 5 of the ZEST project, is a partner in PROSCALE, serves on the advisory board of WIDU.africa and acts as a consultant focal person for the programme. ZEST (Grant Agreement No. 101157382) and PROSCALE are funded by the Circular Bio-based Europe Joint Undertaking and its members under Horizon Europe. Views and opinions expressed are those of the author only and do not necessarily reflect those of the European Union or the CBE JU, neither of which can be held responsible for them.

References

Numbered in the order the claims appear.

1. Population 1.51 bn (2024) to ~2.47 bn (2050): UN World Population Prospects 2024, via INED.
2. Protein supply 69.1 g/capita/day, lowest region: Gebremedhin & Bekele 2021 (PLOS ONE), from FAO food balance data, summarised by Nestlé Nutrition Institute Africa; protein quality: Schönfeldt & Hall, Br J Nutr 2012.
3. Meat 10.5 Mt (2005/07) to 34.8 Mt (2050): World Bank, FAO, ILRI & AU-IBAR, Investing in African Livestock, 2013; per-capita supply under 10 kg: OECD-FAO data via Earthworm Express.
4. Stunted children 61.7 m (2012) to 64.8 m (2024): UNICEF/WHO/World Bank JME 2025, reported by TheCable.
5. Soybean meal at 16–22% of poultry feed: The Standard; Zambia's 2021 ban on soya and sunflower meal: Nation.
6. Alt-protein investment US$881 m in 2025; Europe US$418 m; North America US$347 m; fourth annual decline: GFI via Green Queen.
7. Investor risk perception: Brice, TABLE, Oxford; 1% of global agricultural credit: Alliance Manchester Business School.
8. Separate KEBS, NEMA and KEPHIS approvals, as reported by industry participants: ILRI PAFIE workshop, July 2025.
9. 65% of uncultivated arable land (AfDB claim): AfDB via MyJoyOnline; US$4 bn grain losses: FAO/World Bank, Missing Food, 2011.
10. 55 Mt feed requirement, 46.3% lost (PS Jonathan Mueke, 2024): The Star.
11. KS 2711:2017 (draft DKS 2711:2016, WTO TBT notification, Jan 2017; published standard cited by KEBS as KS 2711:2017 in DKS 2921:2020): GREEiNSECT brief; KS 2921:2020 and KS 2922: People Daily; INSFEED: IDRC; 500 planned BSF units: AllAfrica.
12. German industrial power compensation, 5 ct/kWh to 2028: Polyform; BNetzA prices: Ugebrev.
13. BSF survival at 27, 30 and 36 °C: Tomberlin et al. 2009; larval heat in mass rearing: Black soldier fly larval heat generation and management; European cost pressures: Ryba 2024.
14. Enorm bankruptcy, Oct 2025: AgFunderNews; AgriProtein: Wikipedia; Inseco: AgFunderNews; Andalusia: AgTechNavigator.
15. Spirulina winter output: Allmicroalgae, Portugal; lighting costs: OCL 2021; indoor systems and EU status: FreshPlaza; Kenya imports: WAS 2025; Arthrospira in East African soda lakes: FWF project P19911.
16. German irradiation by month: Grünes Haus; Kenya irradiation: Kariuki & Sato.
17. Kenya 80% renewable: AllAfrica/EPRA; geothermal 41%, imports 12%: Capital FM/EPRA; Germany 55.1%: UBA; industrial tariffs: KAM via The Star, KIPPRA via The Standard.
18. Minimum wages: Nation (Kenya), Connexion Emploi (Germany); TVET enrolment: Capital FM; jobs: The Standard.
19. Lending rate 14.39%: CBK via Khusoko; debt 67.6% of GDP: People Daily; debt service: Business Daily; World Bank: Zawya; USTR 2026: Capital FM.
20. Grid emission factor: The Star.
21. De Heus mill: AllAfrica; EU–Kenya EPA: European Commission; AGOA to 2028: BusinessDay, KNA; Dongo Kundu: The Standard.
22. EU insect feed rules: Regulation (EU) 2017/893, Regulation (EU) 2021/1372.
23. Omena to feed (estimate): Manyala; 35% emissions target: The Star.
24. National Feed Strategy, 400 millers, 2.5 Mt: The Star, 2026; petfood market: Petfood Industry/USDA.
25. Chebole and Kipkenda farm data: the author's first-hand operational records.