Does plant-based dog food contain enough amino acids and taurine? Scientific research indicates.
“But doesn’t my dog just need meat to get enough protein?” It’s one of the first and most common questions we get when we talk about plant-based dog food. The short answer is: no.
Multiple independent, peer-reviewed scientific studies show that well-formulated plant-based dog foods that meet FEDIAF guidelines for amino acids, including the amino acid taurine, perform just as well and in some respects even better than meat-based foods. At the same time, there are a few points where you, as a dog owner, and we, as a dog food provider, need to remain vigilant. Below, we review the most important studies.
What are amino acids and why are they so important for your dog?
Amino acids are the building blocks of protein. These are very important for dogs, just as they are for humans. A dog needs a total of twenty different amino acids, ten of which they cannot produce (sufficiently) themselves and therefore must obtain entirely through their diet. These are nine amino acids that are also essential for humans to obtain through diet (histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine), plus arginine, which is an additional requirement for dogs (Linde et et al., 2024).
Important to know, this concerns nutrients and not ingredients. These amino acids are present in different ratios and quantities in various plant-based protein sources, which, when mixed together, can provide a complete and balanced amino acid profile. A dog, like a human, needs sufficient amounts of these amino acids and not specifically from a meat source. These same amino acids are also found, for example, in peas, lentils, rice, grains, etc.
Does plant-based dog food contain enough protein and amino acids?
Researchers from the University of Nottingham analyzed 31 commercially available, complete dry dog foods in the UK. Of these, 19 were meat-based, 6 veterinary, and 6 entirely plant-based (Brociek et al., 2025). They investigated, among other things, the total protein content and individual amino acids.
The researchers initially expected plant-based diets to score lower in terms of protein and branched-chain amino acids (BCAAs, such as leucine and valine). The opposite turned out to be true: the average BCAA concentrations were higher in plant-based diets than in meat-based diets (which mainly consisted of beef or lamb) (Brociek et al., 2025).
This finding is consistent with an earlier literature review by veterinary nutritionists from the University of Guelph, published in the Journal of the American Veterinary Medical Association (Dodd et al., 2018). Their conclusion: in a well-formulated plant-based diet, neither the total protein content nor the amino acid content is a concern.
What is taurine, and can my dog get it from a plant-based source?
Taurine is the most discussed amino acid in dogs. Good to know: taurine is not considered an essential amino acid for dogs. A dog can synthesize (produce) taurine itself, provided there are sufficient sulfur-containing amino acids methionine and cysteine present in the diet (Dodd, et al., 2018). However, taurine is considered "conditionally essential" in certain breeds, as some dogs, particularly larger breeds, appear to be more susceptible to taurine deficiency.
This susceptibility is not unfounded. Around 2018-2019, the US regulator FDA (via the Vet-LIRN network) investigated an increase in diet-associated dilated cardiomyopathy (DCM) in dogs, particularly in connection with grain-free foods high in legumes. For the Dutch and European market, it is relevant to know that a comparable increase has not yet been reported on the same scale in Europe (Linde et al., 2024). This does not mean that the subject should be ignored, but it does mean that we as producers take taurine and sulfur-containing amino acids seriously and supplement where necessary, instead of relying on "it will all work out."
What do direct measurements say? In a controlled study by Cavanaugh et al. (2021), 34 dogs were fed a commercial plant-based food with pea protein as the main source for four weeks, compared to 4 dogs on a traditional diet. Result: all essential amino acids, except methionine, were higher after four weeks than at the start. Taurine concentration (in both plasma and whole blood) also increased, and after four weeks was even significantly higher in the plant-fed group than in the control group (Cavanaugh et al., 2021).
What does it mean in the long term? What does heart research show?
The short-term results are very good and promising, but this may raise the question: what is the effect over a period of several months or years? Here, the study by Linde et al. (2024), which is currently the longest-running and most comprehensive study on plant-based dog food, is most valuable. Fifteen clinically healthy dogs were followed for twelve months on a commercial plant-based diet (with pea protein as the main source, AAFCO-compliant for adult maintenance), with measurements at 0, 6, and 12 months.
In the long term, the most important outcomes were:
- All essential amino acids remained within or above reference values, with an upward trend over time (Linde et al., 2024).
- Taurine and L-carnitine levels (both important for heart muscle function) showed a slight increase, without a statistically significant difference.
- Cardiac biomarkers (troponin I and NT-proBNP) showed no significant deterioration; both actually showed a downward trend.
- Body weight remained stable.
What should you pay attention to when choosing plant-based dog food?
In addition to the discussed amino acids and taurine, it is important to note that not every food is complete by definition. The same UK study by Brociek et al. (2025) found that plant-based foods scored lower on average for iodine and some B vitamins than meat-based foods, with 57% of the tested foods even having iodine levels below the nutritional guideline. This is not an argument against plant-based food itself, but rather an argument for careful, laboratory-tested formulations with targeted supplementation where necessary, in line with the FEDIAF Nutritional Guidelines (FEDIAF, 2024), the reference standards for complete dog food in Europe.
What does this mean for VerdaDog's food?
This research confirms why we don't assume "plant-based is automatically good" when developing our kibble. We ensure that complete nutrition is truly complete: sufficient and easily digestible protein, a complete amino acid profile, and attention to points such as taurine, iodine, and B vitamins.
Curious about our products? View them here, and read more about how we strive to work as sustainably as possible. Do you have a specific question about nutrition for your dog or VerdaDog itself? Please visit our FAQ page or chat with us.
Frequently asked questions
Does my dog need taurine supplements if he eats plant-based food?
Not automatically. Dogs can produce taurine themselves from the sulfur-containing amino acids methionine and cysteine, provided these are present in sufficient quantities in the diet (Dodd et al., 2018). A well-formulated plant-based food already takes this into account; additional supplementation is not necessary, unless a veterinarian advises it for individual reasons.
Can a dog get enough protein without meat?
Yes, provided the food is well-formulated. Research shows that the total protein and amino acid content of well-formulated plant-based food can be comparable to or even higher than that of meat-based food (Brociek et al., 2025; Dodd et al., 2018).
Why do some plant-based foods still add iodine or B12?
Because research shows that plant-based foods naturally score lower on average for iodine and certain B vitamins than meat-based foods (Brociek et al., 2025). Targeted supplementation is the way to compensate for this and meet FEDIAF guidelines.
Is there a difference between vegetarian and fully plant-based (vegan) dog food in this regard?
The studies in this article were all conducted with fully plant-based (100% animal-ingredient-free) foods. The principle that the right nutrients are more important than the source applies to both variants, as long as the recipe is professionally formulated and tested.
Literature
Brociek, R. A., Li, D., Broughton, R., & Gardner, D. S. (2025). Nutritional analysis of commercially available, complete plant- and meat-based dry dog foods in the UK. PLoS ONE, 20(9), e0328506. https://doi.org/10.1371/journal.pone.0328506
Cavanaugh, S. M., Cavanaugh, R. P., Gilbert, G. E., Leavitt, E. L., Ketzis, J. K., & Vieira, A. B. (2021). Short-term amino acid, clinicopathologic, and echocardiographic findings in healthy dogs fed a commercial plant-based diet. PLoS ONE, 16(10), e0258044. https://doi.org/10.1371/journal.pone.0258044
Dodd, S. A. S., Adolphe, J. L., & Verbrugghe, A. (2018). Plant-based diets for dogs. Journal of the American Veterinary Medical Association, 253(11), 1425–1432. https://doi.org/10.2460/javma.253.11.1425
FEDIAF. (2024). Nutritional guidelines for complete and complementary pet food for cats and dogs. European Pet Food Industry Federation. https://europeanpetfood.org/self-regulation/nutritional-guidelines/
Linde, A., Lahiff, M., Krantz, A., Sharp, N., Ng, T. T., & Melgarejo, T. (2024). Domestic dogs maintain clinical, nutritional, and hematological health outcomes when fed a commercial plant-based diet for a year. PLoS ONE, 19(4), e0298942. https://doi.org/10.1371/journal.pone.0298942
About the author
David is the founder of VerdaDog. He grew up with a dog that struggled with allergies, which made him think about how he could prevent that with his own dog. He has been eating plant-based for over ten years, and that interest in nutrition, for himself and his dog, forms the basis of VerdaDog. This article is based on peer-reviewed research. David does not claim veterinary or scientific expertise and always refers to a veterinarian for medical advice.
