The guide

I'm vegan. Do I need to worry about protein?

By GyroscopeUpdated November 15, 202610 sources

A little, yes. A vegan needs the same 1.2 to 1.6 g of protein per kg a day as anyone, about 75 to 100 g at 140 lb. Plant protein comes packed with starch and fat, so each gram costs more calories, and in a small 2023 study the old minimum of 0.8 g per kg wasn’t enough for vegan men. Put soy, seitan, tempeh or lentils at every meal, and take care of B12. The Gyroscope app personalizes yours.

Why vegans hear two opposite answers

“Where do you get your protein?” is the question every vegan gets, usually from someone who has never counted their own. The answer you hear back from vegan circles is the opposite: every plant has protein, nobody is ever short, and the question is a myth.

Both sides have part of it. Plants can build muscle, and a vegan who plans meals gets enough protein without trouble. But the 2025 to 2030 US Dietary Guidelines list protein among the shortfalls they see in vegan diets, along with a long list of vitamins and minerals. A vegan diet that’s planned covers protein easily. One built on pasta, bread and fries can come up short.

We’d plan protein the way you’d plan any regular bill. Pick one dense plant protein for each meal ahead of time, and the day takes care of itself.

How much protein does a vegan need?

The same range as anyone: 1.2 to 1.6 g per kg of body weight a day, from the 2025 to 2030 US guidelines. That’s about 75 to 100 g at 140 lb and 100 to 130 g at 180 lb. Each meal should reach about 0.4 g per kg, which is 25 g at 140 lb and 35 g at 180 lb. The Gyroscope app personalizes yours.

The old number, 0.8 g per kg, still shows up on vegan sites as proof that protein is easy. One small study tested it directly in vegans.

It’s one small study, but it points the same way as the new US range, which treats 0.8 g per kg as the floor.

Why plant protein costs more calories

Plant foods carry their protein along with starch, fat and fiber. Chicken breast is mostly protein and water. A cup of lentils is protein, carbohydrate and fiber, so you eat more calories to get the same grams.

It’s like shopping at a store where everything costs a little more. You can fill the same cart, and you notice the prices most when your budget is tight. If you eat 2,500 calories a day, a vegan protein day fits easily. If you’re eating 1,500 to lose weight, the foods at the top of that chart are the ones that make it work.

Two foods show the spread. 100 g of protein from black beans alone would be about 6 1/2 cups and 1,490 calories. From firm tofu it’s about 830 calories. Seitan is the leanest plant protein on the list, and peanut butter and quinoa are near the bottom, at about 810 to 820 calories for 30 g.

Do vegans need to combine proteins?

Every plant protein has all nine essential amino acids, the ones your body can’t make. What differs is the mix. We checked each food’s amino acids in USDA FoodData Central against the adult requirement pattern from FAO’s 2013 report on protein quality.

Soy (tofu, tempeh, edamame)Meets the pattern

HisIleLeuLysMetPheThrTrpVal

Black beansMeets the pattern

HisIleLeuLysMetPheThrTrpVal

ChickpeasMeets the pattern

HisIleLeuLysMetPheThrTrpVal

Lentils98%, short on methionine and cysteine

HisIleLeuLysMetPheThrTrpVal

QuinoaMeets the pattern

HisIleLeuLysMetPheThrTrpVal

OatsMeets the pattern

HisIleLeuLysMetPheThrTrpVal

Pumpkin seeds91%, short on lysine

HisIleLeuLysMetPheThrTrpVal

White rice80%, short on lysine

HisIleLeuLysMetPheThrTrpVal

Whole wheat60%, short on lysine

HisIleLeuLysMetPheThrTrpVal

Pasta50%, short on lysine

HisIleLeuLysMetPheThrTrpVal

Peanut butter68%, short on lysine

HisIleLeuLysMetPheThrTrpVal

Almonds60%, short on lysine

HisIleLeuLysMetPheThrTrpVal

By those numbers, soy, black beans, chickpeas, hummus, quinoa and oats all meet the adult pattern on their own. Lentils come in at 98%, a hair short on methionine and cysteine. Grains and nuts run short on lysine: white rice 80%, whole wheat 60%, pasta 50%, peanut butter 68% and almonds 60%.

The old advice to combine has a real reason behind it. Beans carry the lysine grains lack, and a quarter cup of black beans brings a cup of rice up to the pattern. But you don’t need to match every plate. The 2025 to 2030 US guidelines tell vegetarians and vegans to “diversify plant protein sources for amino acid balance”, and a day of mixed meals does that.

The surprise is the most famous combo. Peanut butter on whole wheat stays at 64% of the pattern, because peanuts and wheat are both short on lysine. More of either doesn’t fix it. Try it below, then swap the peanut butter for hummus or the bread for black beans.

Rice and beansHummus and pitaPeanut butter on whole wheatTofu and quinoaLentils and ricePasta and chickpeasOats and hemp seeds

FoodWhite riceBlack beansLentilsChickpeasHummusWhole-wheat pitaWhole wheat breadPeanut butterPeanutsTofu, firmTempehEdamameQuinoaOatsPastaAlmondsPumpkin seedsHemp seedsChia seeds

-1+

1 cup cooked, 4.3 g protein

and

FoodWhite riceBlack beansLentilsChickpeasHummusWhole-wheat pitaWhole wheat breadPeanut butterPeanutsTofu, firmTempehEdamameQuinoaOatsPastaAlmondsPumpkin seedsHemp seedsChia seeds

-1+

1 cup cooked, 15.2 g protein

Together they meet the adult pattern

Adult pattern179146136137136219177196139

HisIleLeuLysMet+CysPhe+TyrThrTrpVal

• The two together
• White rice alone: 80%, lysine
• Black beans alone: meets it

20 g protein432 calories

11 g short of a 30 g meal line, the line for 165 lb. Set your weight to see yours.

Amino acids from USDA FoodData Central, against the adult requirement pattern (FAO 2013). Composition only, before digestion. Soy foods use cooked soybeans and whole wheat uses the whole-wheat pita record, because their own rows don't add up.

The Gyroscope app personalizes yours. These are typical ranges to show you if you're too low, and many people are.

This counts what’s in the food, before digestion. DIAAS, the newer score, also counts how much of each amino acid gets digested. In a 2020 review that pooled pig studies of protein flours and isolates, soy scored 91, pea 70, wheat 48 and rice 47, against 101 for egg. Those numbers use the stricter pattern for young children, and the authors work at Avebe, a company that sells potato protein. They point the same way, with soy the plant protein that comes closest to eggs and milk.

What a vegan day at the range looks like

For a 140 lb adult the range is 75 to 100 g and the meal line is 25 g.

Every meal clears 25 g, and the day lands near the top of the range. Soy or seitan is at two meals, and the beans at lunch carry the lysine the rice is short on. Add fruit, vegetables and an evening snack and you’re still well inside a normal day of calories.

The nutrients to watch

Protein is the easy part to plan. The 2025 to 2030 US guidelines list wider gaps in vegan diets: vitamins A, D, E, B6 and B12, riboflavin, niacin, choline, calcium, iron, magnesium, phosphorus, potassium, zinc and protein. They say to “Monitor nutrient status periodically, especially for iron, vitamin B12, vitamin D, calcium, and iodine”, and to “prioritize targeted supplementation, diversify plant protein sources for amino acid balance, and enhance mineral bioavailability through food preparation techniques”.

B12 comes first. MedlinePlus says B12 “is naturally found in animal foods such as fish, meat, poultry, eggs, milk, and milk products” and “is not present in plant foods unless fortified.” Adults need 2.4 mcg a day, 2.6 in pregnancy and 2.8 while breastfeeding. Fortified breakfast cereals and some nutritional yeast products carry it, so check the label, and it’s in almost all multivitamins and in B12 pills. We’d take it every day in one of those forms and ask your doctor to check your level now and then.

Iron. Iron from vegetables, grains and supplements “is harder for the body to absorb”, and foods rich in vitamin C, like citrus, strawberries, tomatoes and potatoes, increase how much you take in. The RDA is 18 mg a day for women 19 to 50 and 8 mg for men. Beans and lentils with tomatoes or peppers on the same plate help.

Calcium, vitamin D, iodine and zinc are the others the guidelines name. Your doctor can tell you which ones to test and whether a supplement makes sense for you.

Processed vegan food. The guidelines also say to “Significantly limit highly processed vegan or vegetarian foods that can include added fats, sugars, and salt.” Tofu, tempeh, lentils and beans do the protein work without those.

If you’re pregnant or breastfeeding and vegan, talk to your midwife or doctor about B12 and the other gaps above. Our pregnancy guide has the protein numbers.

Should a vegan use protein powder?

It’s useful on days when breakfast is rushed or the meals ran light. Pick soy or pea. Plant powders carry less leucine, the amino acid most tied to switching on muscle building, so take a bigger scoop. In a 2018 lab analysis it took about 38 g of pea protein or 40 g of soy protein to match the leucine in 25 g of whey.

Is pea protein as good as whey? has the rest, and smoothie.guide compares whey and plant powders for a shake.

Do vegans need more protein than everyone else?

Nobody has set a separate range for vegans. The 2023 study only tested 0.8 g per kg, so it can’t tell us whether 1.2 is enough or whether vegans need more.

The muscle trials suggest the normal range works when the protein is there. In a 2023 trial, 22 young adults lifted for 10 weeks on about 2 g per kg a day, and the fully vegan group built as much muscle as the group eating meat. A 2025 review of the trials found soy built the same muscle as milk across 17 of them, while single plant proteins other than soy fell short. Our plants guide goes through those trials. We’d aim for the middle or top of the range, lean on soy, and not chase a bigger number.