Building muscle works on plants — total intake, mixed sources and distribution decide it. Plus the nutrients that belong in a blood test, not on a shelf.
The honest answer: yes, muscle growth and recovery work on plants. What decides it is the total protein across the day, not its origin — 1.4 to 2.0 g per kilogram of body weight per day covers practically every training person [1], and above roughly 1.62 g/kg a meta-analysis of 49 studies found no further gain in fat-free mass [2].
In practice that means three things: sit at the upper end of the range, mix your sources, and spread them across at least four meals at roughly 0.4 g/kg per portion [3]. Plant sources usually deliver a little less protein per portion and a different amino acid profile — which is why the upper end, not because of any fundamental deficit.
The one point where it does get serious is not protein. It is vitamin B12 on a fully plant-based diet — plus iron, vitamin D, calcium, iodine and omega-3 as values worth keeping an eye on. This guide deliberately names no dosages for them: those belong in a blood test and in medical hands.
Take body weight times 1.8 as a working figure instead of the usual 1.6. At 75 kg that is around 135 g a day. The range is the same as for everyone else [1]; the upper end compensates for plant meals often delivering a little less per portion.
For context: the DGE names 0.8 g/kg for adults [4] — the maintenance value for the general population. Training people sit well above that, with or without meat on the plate.
Values per 100 g from our discounter catalogue, as orientation — a calculation basis, not a study:
Important: lentils, oats and pasta are dry weights. 100 g of dry lentils becomes around 250 g cooked. Anyone counting cooked weight massively underestimates their intake.
The practical trick is combining within a meal: a pulse plus a grain is the classic pairing that together gives a rounded amino acid profile — lentils with rice, beans with bread, chickpeas with couscous, peanut butter on whole-grain bread.
On a mixed diet a low-protein breakfast is still somewhat forgiving. On a plant-based one it is not: if the morning is toast and jam, 50 g are missing by evening that no single portion can catch up.
The target picture: roughly 0.4 g of protein per kilogram across at least four meals [3]. At 75 kg that is 30 g four times over — for example oats with soy drink and peanut butter, lentils with rice at lunch, whole-grain bread with hummus in the afternoon, a tofu stir-fry with pasta at night.
For triggering muscle growth itself, the ISSN position stand names 20 to 40 g per serving, or 0.25 g/kg [1] — comfortably reachable with mixed sources.
This is where self-optimisation ends and diagnostics begin. The relevant values:
The only action step this guide recommends: have your blood values checked by a doctor. No dosages, no self-experiments.
Four fixed roles, the same as for everyone else: one pulse (lentils, chickpeas), one grain base (oats, whole-grain pasta, bread), one soy source (tofu, tempeh, soy drink or soy yoghurt) and one no-cook emergency option (hummus, nut butter, soy yoghurt).
The nutrition plan in the Lab already filters its catalogue by vegetarian and vegan, shopping list with pack sizes included — if you would rather not assemble it yourself.
This guide informs, it does not replace medical or dietetic advice. When switching to a fully plant-based diet, during pregnancy and breastfeeding, for children and adolescents, and with pre-existing conditions, nutrition belongs under professional guidance.
For vitamin B12, iron, vitamin D, calcium and iodine this guide deliberately names no dosages. The only permissible next step on suspicion of a deficiency is: have your blood values checked by a doctor. Self-medicating with iron without a proven deficiency can do harm.
Persistent fatigue, pallor, tingling in hands or feet, trouble concentrating or performance drops over weeks belong in a medical assessment and should not be masked with supplements. And if a way of eating increasingly brings rules, restriction and control into your daily life, talk to a registered dietitian or a counselling service.
Build yourself a protein base pot for the week: simmer 250 g of red lentils in vegetable stock with passata, onion and spices until soft, and that is it. Red lentils need no soaking and collapse into the sauce themselves.
The pot delivers around 60 g of protein, costs a little over a euro, and is the base for four completely different meals: as bolognese over whole-grain pasta, as curry with rice, as soup with bread, as a spread with a spoon of nut butter. Making that pot on a Sunday solves the plant protein problem for half the week in twenty minutes.
Across four to five meals, each with a real protein source. At 75 kg, 120 g is comfortably reachable with: oats plus soy drink plus peanut butter for breakfast, lentils with rice at lunch, whole-grain bread with hummus in the afternoon, tofu with pasta at night. Spreading it across at least four meals at roughly 0.4 g/kg [3] is the actual lever.
On a fully plant-based diet above all vitamin B12, plus iron, vitamin D, calcium, iodine and omega-3. A vegetarian diet with dairy and eggs defuses much of this. The right route on suspicion is always a medical assessment of your blood values — this guide deliberately names no dosages.
On a fully plant-based diet, B12 cannot be reliably covered through food, so supplementation is standard practice. How and in what form is something you settle with a doctor, monitoring included. On a vegetarian diet with dairy and eggs the situation is more relaxed, but a check still makes sense.
Per portion it usually delivers slightly less and has a different amino acid profile. Across a day and with mixed sources that evens out — which is why the recommendation is to sit at the upper end of the 1.4 to 2.0 g/kg range [1] and to combine pulses with grains. Above the roughly 1.62 g/kg mark, extra protein produced no further gain in the meta-analysis anyway [2].
No, but it is convenient. With lentils, chickpeas, tofu, oats, whole grains and nut butter the target is well within reach. Powder mainly becomes useful if you train a great deal, have little time, or struggle to fit the amount into solid meals — as a shortcut, not as a prerequisite.
Meal Prep for Athletes: The Weekly Plan That Actually Holds Up