Where to find protein on a vegetarian diet

How much protein you actually need, which foods carry it, and how to cook it without thinking about it every day.

·3 min read

Photo illustrating the article “Where to find protein on a vegetarian diet”

It is the first question anyone will ask you. It rarely comes from nutritional worry and more often from honest curiosity, so it helps to have a clear answer.

How much you need

The European Food Safety Authority sets 0.83 grams of protein per kilo of body weight per day for an adult. Someone weighing 70 kilos is aiming at roughly 58 grams. Strength athletes go up towards 1.4 to 2 grams per kilo.

That figure looks large until you break it down. A plate of mujaddara already covers a third of the day. Hummus with bread carries about ten grams. The total adds up without any special effort.

The foods that actually carry it

Pulses come first by a wide margin. A hundred grams of dry lentils holds 25 grams of protein, as much as the same weight of meat, at a twentieth of the price.

Food (100 g dry) Protein
Lentils 25 g
Chickpeas 19 g
Black beans 21 g
Tempeh 19 g
Firm tofu 15 g
Quinoa 14 g
Bulgur 12 g

Eggs and dairy fill the gap easily if you are not vegan. One egg carries 6 grams, a hundred grams of feta carries 14.

The amino acid story

You will read that you must “combine” grains and pulses at every meal to get complete protein. That idea comes from a book written in the seventies, and its author corrected it herself afterwards. The body keeps a pool of amino acids for several hours. Eating varied food across the day is enough.

That said, traditional cuisines made this pairing long before any theory existed. Rice and lentils in Lebanon, maize and beans in Mexico, semolina and chickpeas across the Maghreb. Those dishes are balanced because generations adjusted them.

Three ways to stop thinking about it

Cook pulses ahead. One pot of lentils or chickpeas on Sunday gives you the base of four meals, from a chana masala to a cold salad. They keep five days in the fridge and freeze well.

Keep firm tofu and tempeh to hand. Tempeh is the richer of the two and its nutty flavour stands up better to spices, as a tempeh goreng fried with sambal shows.

Lean on dishes that already do the work. Indian dal, Indonesian gado-gado and Lebanese mujaddara are not substitute meals: they are complete dishes that whole cuisines have eaten for centuries.

The one nutrient that does need attention

It is not protein, it is vitamin B12. No plant food carries it in a usable form. A vegetarian diet with eggs and dairy supplies enough. A vegan diet needs a supplement, that part is not negotiable, and it costs a few euros a year.

Keep an eye on iron and zinc too, both absorbed better alongside vitamin C. A squeeze of lemon over lentils is not only about taste.

Recipes in this article

Frequently asked questions

Is plant protein absorbed as well as protein from meat?

Slightly less well. Protein from pulses and grains is a little less digestible than protein from eggs or meat, and its amino acid profile is less balanced when a single food is eaten on its own. In practice you make up the difference by eating a bit more and by varying sources across the day, which happens naturally on a diet that rotates pulses, whole grains, nuts and seeds, and eggs and dairy if you eat them.

Do the numbers in the table apply to cooked lentils?

No, they are per 100 grams of dry product. Pulses absorb two to three times their weight in water as they cook: 100 grams of dry lentils becomes roughly 250 grams cooked, and the protein per 100 grams falls in the same proportion. A normal serving of cooked lentils therefore delivers something closer to ten grams of protein.

What about seitan, often listed as the highest-protein plant food?

Seitan is wheat gluten, and it is indeed the most protein-dense plant food. Two caveats: it is low in lysine, so it is better eaten alongside pulses than on its own, and it is obviously ruled out with coeliac disease or gluten intolerance. It is not a traditional food in most of the cuisines covered on this site, where lentils and chickpeas fill that role.

Are protein powders worth buying?

For ordinary eating, no. The targets above are met with whole foods, which bring fibre, iron and zinc along with the protein. A powder can help a strength athlete aiming at two grams per kilo a day who struggles to eat that volume of food. It is a convenience, not a requirement.

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