Protein: A practical answer for vegans
It’s the question vegans hear so often that it can sound like a punchline. It is also a fair nutrition question: protein is essential, and a diet that excludes meat, fish, eggs, and dairy needs other dependable sources.
The short answer is that vegans get protein from beans, lentils, peas, soy foods, seitan, nuts, seeds, and grains. The fuller answer is that protein adequacy depends on the overall diet—how much food someone eats, what they choose, and their needs—not on whether protein came from an animal.
How much protein do people need?
For most healthy adults, the U.S. Recommended Dietary Allowance is 0.8 grams of protein per kilogram of body weight each day. For a 70-kilogram (154-pound) adult, that works out to about 56 grams daily. It is a population-level target designed to meet the needs of nearly all healthy adults; it is not a universal prescription for every person. Needs can differ with age, illness, pregnancy, recovery, energy intake, and training. (Institute of Medicine, 2005)
That target is achievable with ordinary foods. A meal can build around tofu, tempeh, edamame, lentils, chickpeas, beans, split peas, or seitan. Nuts, seeds, whole grains, and some vegetables add more. Fortified soy milk and higher-protein plant-based alternatives can be convenient, though their protein content varies by product. Protein powder is an option, not a requirement.
A simple habit is to include a clear protein-rich food at meals: oatmeal with soy milk and seeds; a lentil or bean bowl with grains; tofu or tempeh with vegetables; or hummus and whole-grain bread with a side of edamame. That makes protein easier to meet without turning every meal into arithmetic.
Do plant proteins have all the amino acids?
The body uses amino acids to build and repair proteins. Plant foods contain the essential amino acids, but their proportions and digestibility vary. Legumes tend to be relatively rich in lysine, while many grains are lower in lysine; grains tend to provide more of the sulfur-containing amino acids that legumes supply in smaller amounts. Eating a variety of protein foods across the day generally covers these differences. There is no need to combine a precise pair of foods at every meal.
Soy foods are especially useful because they provide substantial protein and a balanced essential-amino-acid profile. Other practical choices include lentils, beans, peas, seitan, peanuts, and mixed plant-protein products. A varied diet matters more than finding one magical “complete protein.”
Is it harder to get enough on a vegan diet?
It can take more planning. On average, vegans often consume less protein than people who eat animal foods, and plant-based meals may need a larger portion of the protein-rich ingredient to deliver the same amount. A 2024 Brazilian survey found that most participants met protein and essential-amino-acid recommendations, but the study relied on a one-day food diary and recruited participants online; it should not be treated as a guarantee for every vegan or population. (Leitão et al., 2024; West et al., 2023)
So the honest answer is neither “protein is never a concern” nor “vegan diets can’t provide enough.” A diet built mostly from low-protein foods, with too little total energy or few legumes and soy foods, may fall short. A diet that regularly includes protein-rich plant foods can meet ordinary adult needs. If someone has unusually high needs or a medical condition affecting diet, individualized advice from a registered dietitian can help.
What about building muscle?
Muscle growth requires training, enough total food, and enough protein over time. Protein source can affect how strongly a single serving stimulates muscle protein synthesis, and some plant proteins are less digestible or lower in particular essential amino acids than animal proteins. That makes source choice and total intake worth considering—especially for athletes—not a reason to assume muscle cannot be built on a vegan diet.
In a controlled study, healthy young adults following high-protein vegan or omnivorous diets during resistance training gained muscle and strength to a similar degree. The vegan diet relied heavily on mycoprotein, and the study was small, so it does not prove every vegan diet will produce the same results. A 2025 review of randomized trials found a small average advantage for animal protein in muscle-mass outcomes, mainly compared with non-soy plant proteins, but no clear difference in strength or physical performance; the authors also emphasized limited evidence for several plant sources. Together, these findings support a practical conclusion: adequate protein and progressive training are central, and soy or other well-planned plant proteins can support muscle development. (Monteyne et al., 2023; Reid-McCann et al., 2025)
Athletes generally need more protein than sedentary adults, with targets depending on sport and training load. A sports dietitian can help translate those goals into a vegan eating plan; tofu, tempeh, soy milk, seitan, legumes, mycoprotein, and protein blends can make higher intakes more manageable. (West et al., 2023)
The question behind the question
“Where do you get your protein?” is often asked as if animal products were the only reliable answer. They are convenient sources, but they are not the only ones. The useful questions are: What is your protein-rich food today? Are you eating enough overall? Does your pattern fit your needs?
For many vegans, the answer is a familiar rotation of beans, lentils, tofu, tempeh, peas, seitan, nuts, seeds, and grains. No exotic ingredients or constant supplements required—just a little intention about what anchors the meal.
References
Institute of Medicine. (2005). Dietary reference intakes for energy, carbohydrate, fiber, fat, fatty acids, cholesterol, protein, and amino acids. National Academies Press. doi:10.17226/10490.
Leitão, A. E., Esteves, G. P., Mazzolani, B. C., Smaira, F. I., Santini, M. H., Santo André, H. C., Gualano, B., & Roschel, H. (2024). Protein and amino acid adequacy and food consumption by processing level in vegans in Brazil. JAMA Network Open, 7(6), e2418226. doi:10.1001/jamanetworkopen.2024.18226.
Lim, M. T., Pan, B. J., Toh, D. W. K., Sutanto, C. N., & Kim, J. E. (2021). Animal protein versus plant protein in supporting lean mass and muscle strength: A systematic review and meta-analysis of randomized controlled trials. Nutrients, 13(2), 661. doi:10.3390/nu13020661.
Monteyne, A. J., Coelho, M. O. C., Murton, A. J., Abdelrahman, D. R., Blackwell, J. R., Koscien, C. P., Knapp, K. M., Fulford, J., Finnigan, T. J. A., Dirks, M. L., Stephens, F. B., & Wall, B. T. (2023). Vegan and omnivorous high protein diets support comparable daily myofibrillar protein synthesis rates and skeletal muscle hypertrophy in young adults. The Journal of Nutrition, 153(6), 1680–1695. doi:10.1016/j.tjnut.2023.02.023.
Reid-McCann, R. J., Brennan, S. F., Ward, N. A., Logan, D., McKinley, M. C., & McEvoy, C. T. (2025). Effect of plant versus animal protein on muscle mass, strength, physical performance, and sarcopenia: A systematic review and meta-analysis of randomized controlled trials. Nutrition Reviews, 83(7), e1581–e1603. doi:10.1093/nutrit/nuae200.
West, S., Monteyne, A. J., van der Heijden, I., Stephens, F. B., & Wall, B. T. (2023). Nutritional considerations for the vegan athlete. Advances in Nutrition, 14(4), 774–795. doi:10.1016/j.advnut.2023.04.012.