How Much Protein Do You Actually Need (and How to Hit It)

The official RDA for protein is 0.8 g per kilogram of body weight. That number was set to prevent deficiency — the floor at which a sedentary adult stops losing lean mass. It is not the optimum. Two decades of research on body composition, satiety, and aging point to a higher target: 1.2–1.6 g/kg for most adults, 1.6–2.2 g/kg if you train or cut calories. Most people don't track and don't hit it.

This guide breaks down the actual numbers, the sources that deliver them, and the common reasons people undercount.

RDA versus the optimum

The 0.8 g/kg figure comes from short-term nitrogen balance studies in healthy young adults. It works as a public-health minimum. It doesn't account for muscle protein synthesis, satiety, or age-related sarcopenia.

Practical targets:

Situation	Daily target (g/kg)	Example (70 kg adult)
RDA (US/EU minimum)	0.8	56 g
Sedentary optimum	1.0–1.2	70–84 g
Endurance training	1.2–1.6	84–112 g
Strength training	1.6–2.2	112–154 g
Cutting (calorie deficit)	1.6–2.4	112–168 g
Elderly (>65, sarcopenia prevention)	1.0–1.2	70–84 g

The strength-training range comes from Morton 2018 — a meta-analysis of 49 studies that found protein-driven gains in lean mass plateau around 1.6 g/kg, with benefit up to 2.2 g/kg in some individuals. The cutting range comes from Helms 2014: in a calorie deficit, protein climbs because the body has more reason to break down muscle for energy. The elderly target reflects Bauer 2013: protein needs go up after 65, not down — older muscle is less responsive to a given amino acid load.

Two worked examples

70 kg woman, sedentary, losing weight. Target: 1.6 × 70 = 112 g/day. Spread across four meals: ~28 g each.

80 kg man, lifting three times a week, maintaining weight. Target: 1.6 × 80 = 128 g/day. Four meals of 32 g, or three meals of 35 g + a 25 g snack.

These numbers feel high if you don't track. Most people who "eat plenty of protein" land at 60–80 g.

Top sources

Per 100 g, cooked unless noted:

Food	Protein (g)	Notes
Chicken breast	31	Lean reference
Lean beef	26	Sirloin, top round
Salmon	25	Plus omega-3
Tuna, canned in water	25	Cheap, shelf-stable
Seitan	25	Wheat gluten, vegan
Almonds	21	580 kcal — calorie-dense
Tempeh	19	Fermented soybean, vegan
Tofu, firm	17	Vegan, complete amino acids
Eggs	13	~6 g per large egg
Cottage cheese	11	Casein-dominant
Greek yogurt, 2 %	10	~15 g per 150 g serving
Lentils, cooked	9	Plus fiber
Black beans, cooked	9	Plus fiber
Quinoa, cooked	4	Complete amino acids

A 150 g chicken breast delivers ~45 g protein. A whole can of tuna (~120 g drained), ~30 g. Three eggs, ~18 g. Build meals around one of these and the daily target works out.

How to distribute it across the day

Older research suggested a cap of 20–30 g per meal — anything above that supposedly wasted because muscle protein synthesis saturates. Trommelen 2023 challenged this directly: a single dose of 100 g protein produced sustained MPS over many hours, with no apparent ceiling. The practical implication: distribution matters less than the daily total.

A workable pattern for most people: 25–40 g per meal × 4 eating occasions = 100–160 g/day. Higher single doses are fine. Lower ones — 5–10 g of protein at breakfast — are the actual problem, because they leave most of the daily target to recover later.

Protein quality

Not all protein is equal. PDCAAS and DIAAS scores rate how completely a protein supplies the nine essential amino acids and how well humans absorb them.

Whey — DIAAS 1.0+. Highest. Used as the reference.
Eggs, dairy, fish, meat — 0.9–1.0. Effectively complete.
Soy (tofu, tempeh, edamame) — ~0.9. The strongest plant source.
Most individual plant proteins — 0.5–0.8. Lower in one or two amino acids: legumes are low in methionine, grains low in lysine.

Quality matters at the margin. If you eat varied food and hit your total, it usually works out. If you eat one source — a 100 % rice diet, for example — you'll need more total grams to deliver the same amino acid mix.

Vegan protein

Plant proteins are individually less complete. The fix is volume plus variety:

Eat 10–15 % more total protein to compensate for lower DIAAS. If a meat-eater targets 1.6 g/kg, a vegan aiming for the same training outcome can aim for 1.8 g/kg.
Combine sources across the day. Legumes (low methionine) + grains (low lysine) cover each other. The classic "rice and beans" pairing is one example. Seeds + cereals, nuts + legumes work the same way. The combination doesn't have to happen in the same meal.
Lean on high-quality plant sources. Tofu, tempeh, seitan, and pea or soy protein powder all deliver 17–25 g per 100 g with near-complete amino acid profiles.

A vegan diet can deliver 130 g of protein on 2,200 kcal without supplements. It takes deliberate construction — not just removing meat from a standard plate.

Myths worth dropping

"More than 30 g per meal is wasted." Outdated. Trommelen 2023 showed sustained MPS at 100 g doses. Distribution matters far less than total.

"Protein damages kidneys." Devries 2018 — a meta-analysis of 28 trials — found no impact of high-protein diets on kidney function in healthy adults. The caveat applies only to existing kidney disease.

"Protein causes osteoporosis." The opposite. Hannan 2000 showed lower protein intake correlated with greater bone loss in the Framingham cohort. Higher protein, especially with adequate calcium, supports bone mass.

"Plant protein is incomplete." Partially true for single sources. A mixed plant diet covers all amino acids — the body doesn't need them in the same meal.

Why people undercount

Three patterns repeat:

Eyeballing portions. One chicken breast feels like enough; it's usually 150 g cooked = ~45 g protein. You still need 60–80 g more across the day.
Skipping breakfast protein. Toast, oatmeal, fruit — 5–10 g protein. Front-loading 25–30 g (eggs, Greek yogurt, cottage cheese) makes the daily target reachable.
Overcounting "high-protein" foods. Peanut butter is 25 % protein by weight — but 75 % fat. Two tablespoons (32 g) = 8 g protein and 200 kcal. Almonds are similar. Nuts and seed butters add up on calories before they add up on protein.

Finding high-protein foods in Vnutri

The /nutrient/high-protein filter in the Vnutri food catalog sorts every food in the database by protein per 100 g, threshold ≥ 15 g. The top entries are exactly what you'd expect — poultry, fish, lean meat, tofu, tempeh, cottage cheese, Greek yogurt — but the filter also surfaces less-obvious ones (seitan, edamame, nutritional yeast, certain hard cheeses). Useful when you want a quick comparison without searching one food at a time.

If you're building meals around a specific diet, see also /diet/keto — high-protein and low-carb overlap heavily but aren't identical.

Frequently asked questions

Is 1 g per pound (≈ 2.2 g/kg) realistic for everyone?

For most lifters, yes — and the literature supports it as an upper-end target. For a 80 kg / 175 lb adult, that's 175 g protein per day. Practical, if expensive. For untrained or sedentary adults, it's more than needed — 1.0–1.2 g/kg covers them. The "1 g per pound" rule is bodybuilding folklore that maps roughly to the 2.2 g/kg ceiling, not a universal target.

Can I eat too much protein?

In healthy people, the upper limit is mostly practical — not toxicological. Protein is satiating; pushing above ~2.5 g/kg displaces carbs and fat in a calorie-controlled diet, which can affect training output. No reliable evidence of harm at 2.0–2.5 g/kg in healthy adults across multiple long-term studies. Existing kidney disease changes the picture — discuss with a doctor.

Do I need protein powder?

No. Whole foods cover any target up to 2 g/kg without much effort once you front-load each meal. Powder is convenient, not essential: a scoop of whey delivers 20–25 g in 30 seconds and survives travel. Useful when your schedule fights your eating, optional otherwise.

What's the best breakfast for protein?

Anything that delivers 25–30 g. Three eggs (~18 g) + 100 g cottage cheese (11 g) = 29 g. 200 g Greek yogurt (20 g) + 30 g almonds (6 g) = 26 g. A 150 g chicken breast at breakfast also works — cultural preference is the only obstacle. The pattern people default to (toast, cereal, fruit) lands at 5–10 g.

Does pre/post-workout timing matter?

Less than the daily total. The "anabolic window" turned out to be 4–6 hours wide, not 30 minutes. Schoenfeld 2017 found no clinically meaningful difference between pre- and post-workout protein once total daily intake was matched. Eat a protein-containing meal within a couple of hours either side of training and you're fine.

Can a vegan diet hit the same protein target?

Yes. Tofu, tempeh, seitan, lentils, beans, edamame, soy or pea protein powder all stack to 130+ g/day on a normal calorie intake. The work is in variety and volume, not in pursuing one perfect source. See the vegan vs vegetarian guide for fuller context.

References

Morton RW et al. (2018). A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. Br J Sports Med.
Trommelen J et al. (2023). The anabolic response to protein ingestion during recovery from exercise has no upper limit in magnitude and duration in vivo in humans. Cell Reports Medicine.
Bauer J et al. (2013). Evidence-based recommendations for optimal dietary protein intake in older people: a position paper from the PROT-AGE Study Group. JAMDA.
Helms ER et al. (2014). A systematic review of dietary protein during caloric restriction in resistance trained lean athletes. Int J Sport Nutr Exerc Metab.
Devries MC et al. (2018). Changes in kidney function do not differ between healthy adults consuming higher- compared with lower- or normal-protein diets: a systematic review and meta-analysis. J Nutr.
Hannan MT et al. (2000). Effect of dietary protein on bone loss in elderly men and women: the Framingham Osteoporosis Study. J Bone Miner Res.
Phillips SM et al. (2016). Protein "requirements" beyond the RDA: implications for optimizing health. Appl Physiol Nutr Metab.