How do I calculate my number if I'm overweight — bodyweight or lean mass?

For adults more than ~15% above their ideal weight, base the calculation on a reasonable target bodyweight or on lean body mass, not current total weight. Otherwise the number gets unnecessarily high. A 100 kg adult with 40% body fat doesn't need 220 g of protein — they need ~140–160 g, calculated against a 70–80 kg target weight. The protein calculator at /tools/protein adjusts for this automatically.

Do I need protein powder, or can I get it all from food?

You can absolutely hit any reasonable protein target from food alone — eggs, chicken, fish, paneer, dal+rice, soya, Greek yogurt, lentils. Protein powder is a convenience, not a requirement. The main case for whey or casein is the per-meal math: if your target is 180 g and you can only realistically eat 30–35 g per meal from whole food without feeling stuffed, a shake bridges the gap. For most people at 100–150 g/day, whole food handles it.

Is 'too much' protein dangerous?

In adults with healthy kidneys, no. Studies have followed resistance-trained adults at 3.0–4.4 g/kg for up to a year with no clinically significant kidney impact (Antonio 2014). The genuine ceiling is the calorie one — at very high intakes, protein still has calories and will push you out of your daily target. If you have existing kidney disease, diabetes, or controlled-but-marginal blood pressure, get baseline kidney bloods (creatinine, eGFR) before pushing past 2 g/kg and work with a doctor.

What about plant protein — does it count the same as whey or chicken?

Gram-for-gram, plant protein triggers slightly less MPS at the same dose, because plant proteins are typically lower in leucine (the key trigger amino acid) and have lower digestibility scores (DIAAS). The fix is straightforward: vegetarians and vegans should aim for ~15–20% higher total daily protein and ~30–40 g per meal rather than 25–30, and emphasise the higher-quality plant sources (soya, paneer, tofu, dal+rice combinations). Once the dose is adjusted, long-term outcomes are similar.

Should I eat protein right after training? Is the 30-minute anabolic window real?

The 30-minute window is a myth in its strict form. The actual window for post-training protein intake is closer to 4–6 hours, and what matters is total daily protein and per-meal dosing, not the exact timing of the post-workout meal. That said, if you trained fasted or your last protein-containing meal was 4+ hours ago, eating 30–40 g of protein within 2 hours of training is sensible — it gives the muscle the amino acids it just signalled for. Don't sprint home from the gym to slam a shake.

If I'm over 50, do I really need more protein than my 25-year-old self?

Yes, slightly. The per-day target is broadly the same (1.6–2.0 g/kg if you train), but the per-meal target rises because of anabolic resistance — the same 25 g dose that triggered MPS in your 25-year-old self may not at 65. Aim for 35–45 g per meal across 3–4 meals, leucine-rich sources (animal protein, dairy, soya), and pair every meal with some resistance training during the week. This is the strongest single dietary lever against sarcopenia, with the geriatric literature consistent on it (PROT-AGE 2013).

How much protein do you actually need?

Forget the 1g-per-pound rule of thumb. Here’s what the research actually says — and how to scale your intake to your goal, body, and training load.

Bassam Mallick8 May 2026 7 min read

nutrition

protein

muscle

Editorially reviewed

Bassam Mallick · Last reviewed 8 May 2026

Master Nutrition Coach · MSc Kinesiology, Sports & Performance Nutrition · Lifestyle & Metabolic Medicine, Harvard Medical School

Almost every client I've worked with in the last decade has heard the "1 gram per pound of bodyweight" rule. Almost none of them know where it came from, whether it applies to them, or what to do with the number once they've calculated it.

The pattern repeats across the most common protein conversations I have. Lifters in their twenties hit it religiously and stall because they've stacked 600–800 kcal of chicken on top of an already-adequate diet. Vegetarians quietly fall 40 g short every day and blame their genetics for not building muscle. Older clients chase the same number their 25-year-old training partner uses, eating more protein than their kidneys love and less than their muscles need. The rule isn't wrong — it's just incomplete, and the incompleteness is what keeps doing the damage.

For decades, the answer to "how much protein should I eat?" came from bodybuilding magazines: 1 gram per pound of bodyweight. Catchy. Easy to remember. Mostly wrong for the people repeating it. The actual evidence base is much more nuanced — and much more practical once you understand what protein is doing in the body and why the body has clear limits on what it can use in any one sitting.

Key takeaways

The RDA of 0.8 g/kg is the minimum to prevent deficiency in a sedentary person — not the optimum for anyone training, dieting, or over 50.
The meta-analysis ceiling for muscle gain is 1.6 g/kg/day (Morton 2018). Beyond ~2.2 g/kg, additional protein gives diminishing returns for muscle, though it still helps appetite control and lean-mass preservation in deficits.
Muscle protein synthesis (MPS) plateaus per meal at roughly 0.4 g/kg (Schoenfeld & Aragon 2018) — about 30–40 g for most adults. Spreading intake across 3–4 meals beats one giant 100 g protein bomb.
Cutting raises protein needs, not lowers them. Lean athletes in severe deficits do best at 2.3–3.1 g/kg (Helms 2014).
Adults over 50 face anabolic resistance — same dose triggers less MPS. The geriatric literature pushes minimum 1.2 g/kg, with 1.6–2.0 g/kg as the working target for active older adults (Bauer 2013).

What protein is actually doing in the body

Every protein conversation gets cleaner once you understand the underlying biology. Three things happen continuously, every day, in every adult:

Muscle protein synthesis (MPS) — the building of new muscle proteins from dietary amino acids. Triggered by training, leucine intake, and insulin.
Muscle protein breakdown (MPB) — the constant turnover of muscle protein for repair, immune function, and energy. Always happening.
Net protein balance = MPS − MPB. When net is positive over weeks and months, you gain or maintain muscle. When net is negative, you lose it.

Protein intake is the lever that pushes the balance toward positive. Training is what directs that positive balance into muscle rather than just maintenance. Without training, even very high protein intake won't build muscle. Without protein, even excellent training can't build it. They're a system.

This is why protein recommendations vary so much across populations. The same person needs different intakes when they're sedentary, when they're training hard, when they're cutting, and when they're 70. The number isn't bodyweight-times-a-constant — it's a function of what your body is currently being asked to do.

The minimum vs the optimum (and the ceiling)

The RDA (Recommended Dietary Allowance) of 0.8 g/kg is the minimum to prevent nitrogen-balance deficiency in a sedentary person. It is not a target. It's a floor below which a healthy adult starts to lose lean mass, hair quality, immune function, and recovery. For anyone in this article's audience — training, dieting, or trying to age well — the RDA is irrelevant as a goal.

The cleanest data on the actual optimum comes from Morton et al. 2018 in the British Journal of Sports Medicine: a meta-analysis pooling 49 studies and 1,863 participants, all doing resistance training, randomised across protein doses. The headline finding: muscle and strength gains plateau at ~1.6 g/kg/day. Pushing higher doesn't make people gain more muscle when calories and training are matched.

But "plateau for muscle gain" is not the same as "no benefit above 1.6." Higher protein still:

Suppresses appetite better (the most reliable observation in nutrition behavioural research — protein is the most satiating macronutrient gram-for-gram).
Protects lean mass in a deficit. Helms et al. 2014 reviewed protein needs during cuts in lean athletes and landed on 2.3–3.1 g/kg of lean body mass for severe deficits — well above the gain-phase 1.6.
Replaces less satisfying calories without adding kcal density. 100 g of grilled chicken at 165 kcal vs 100 g of rice at 130 kcal — almost identical calories, very different effects on hunger.

So the practical bands shake out to:

| Goal | Range | |---|---| | RDA / sedentary deficiency floor | 0.8 g/kg | | General health, no training | 1.0–1.2 g/kg | | Recreational fitness, 2–3 sessions/wk | 1.4–1.6 g/kg | | Muscle gain or maintenance while training | 1.6–2.2 g/kg | | Cut, with training | 2.0–2.4 g/kg | | Severe cut, lean & advanced | 2.3–3.1 g/kg of LBM | | Adults 50+ (anabolic resistance) | 1.6–2.0 g/kg |

This is the range the entire current literature converges on. The "1 g per pound" rule, when converted (1 g/lb ≈ 2.2 g/kg), happens to land at the top of the gain band — which is why it's not catastrophically wrong, just blunt.

The per-meal ceiling (and why "you can only absorb 30 g" is the wrong frame)

You've probably heard "your body can only absorb 30 g of protein per meal." This is misleading. The body absorbs essentially all dietary protein eventually — there's no untold gut wastage of dietary amino acids in healthy people.

What's actually true is more interesting: the muscle protein synthesis response plateaus per meal. Schoenfeld & Aragon 2018 reviewed the per-meal dose-response literature and concluded the MPS-maximising dose is roughly 0.4 g/kg per meal — about 30–40 g for most adults, slightly higher for older adults (anabolic resistance again).

Beyond that 30–40 g, the additional amino acids don't get "wasted" — they get used for other things. Some go to gluconeogenesis (glucose synthesis), some to oxidation (energy), some to organ repair, some to gut-lining turnover, some to immune cells. All useful. None of it is building extra muscle.

This is the engineering insight of the per-meal ceiling: spread your protein. A daily 150 g spread across 4 meals of 35–40 g triggers MPS four times. The same 150 g eaten as a single 100 g dinner triggers MPS once and the other 100 g of protein gets oxidised. Same number on the food log. Different muscle outcome.

The body absorbs all the protein you eat. The question isn't whether it gets absorbed — it's how much of it triggers muscle building, and that number plateaus per meal.

A small but important nuance: pre-sleep protein behaves slightly differently. Trommelen & van Loon 2016 showed 30–40 g of slow-digesting protein (casein, paneer, curd) before bed continues to support overnight MPS and recovery. For someone trying to hit 150–180 g/day, a casein-rich pre-sleep meal is one of the cleanest ways to get the last 30 g in without forcing it during the day.

What changes during a cut

When you drop calories, your protein needs go up, not down. The mechanism: protein has two jobs at all times, and the relative importance shifts in a deficit.

Provide amino acids for MPS (muscle building) — the dominant job at maintenance or surplus.
Spare lean mass from being burned for fuel — relatively minor at surplus, becomes dominant in a deficit.

In a deficit, the body looks for fuel everywhere it can — body fat first, but also lean tissue (muscle, organ protein) when amino acid supply is low. Eating more protein is what tells the body to leave the muscle alone and burn the fat. Longland et al. 2016 showed this experimentally: identical calorie deficits, two groups, one at 1.2 g/kg and one at 2.4 g/kg. The high-protein group gained 1.2 kg of lean mass while losing fat in a deficit. The lower-protein group lost lean mass even with training.

Practical translation: in a cut, push to the upper end of your bodyweight band. If your maintenance target is 1.6 g/kg, your cut target is 2.0–2.4 g/kg. Keep total calories down. Let protein eat into the carb and fat budget.

What changes with age

This is the most under-appreciated piece of the protein conversation. Adults over roughly 50 experience anabolic resistance — the same dose of dietary protein triggers less MPS than it did at 25. The mechanism is complex (some leucine sensitivity loss, some insulin resistance at the muscle, some chronic low-grade inflammation), but the consequence is simple: older adults need more protein per meal, not less, to get the same anabolic signal.

The PROT-AGE working group (Bauer et al. 2013) reviewed the geriatric literature and recommended minimum 1.0–1.2 g/kg for healthy older adults and 1.2–1.5 g/kg for active or sarcopenic ones. Practical clinical experience and more recent data push the active-older-adult target to 1.6–2.0 g/kg — essentially identical to a training adult.

The per-meal target also rises with age. Where a 25-year-old maximises MPS at 25–35 g per meal, a 65-year-old often needs 35–45 g to trigger the same response. This is partly why "elderly malnutrition" can co-exist with apparently adequate total protein intake — the per-meal dosing was too low to actually drive MPS.

How to actually structure your day

The cleanest practical architecture for almost everyone in the gain or maintenance band:

Total target: your body weight × your goal-band multiplier (use the protein calculator to back-calculate).
Per-meal target: 30–40 g of protein × 4 meals across the day. Older adults: 35–45 g × 4.
Pre-sleep meal: 25–40 g of slow-digesting protein (casein, paneer, curd, yogurt) before bed if you train hard.
Training-day timing: within 2–3 hours after training. The "anabolic window" of 30 minutes is a myth — the window is closer to 4–6 hours, but eating a protein-containing meal somewhere in that window is what matters.

For a 70 kg active adult on a moderate cut, that's 140–170 g/day — roughly four meals of 35–40 g each, or three meals of 40 g plus one 30 g snack. Not a hardship. Not 200 g either.

A note on safety

The "protein damages kidneys" worry deserves an honest answer. In adults with healthy kidneys, intakes up to 2.5–3.0 g/kg have been studied repeatedly and show no clinically significant change in kidney function (Antonio et al. 2014 followed resistance-trained subjects on 4.4 g/kg for a year with no kidney issues). In adults with existing kidney disease, the calculus changes — those adults should be working with a nephrologist, not following a generic blog target.

If you have diabetes, hypertension that's poorly controlled, or a family history of CKD, get an annual creatinine + eGFR check before pushing protein hard. The threshold for concern is real but specific.

The bottom line

Pick your goal band. Multiply by your body weight. Spread the total across 3–4 meals, each landing in the 30–40 g window. Track honestly for a week to see what you're really hitting, then adjust.

The exact decimal point matters less than consistency over months. 1.8 g/kg eaten every day for 12 weeks builds more muscle than 2.5 g/kg eaten three days a week.

Want this turned into a meal plan? The free diet plan builder generates a 7-day plan that hits your protein target automatically, with vegetarian, vegan and non-veg options. The protein calculator gives you the per-day number to feed into it.

Frequently asked questions

How do I calculate my number if I'm overweight — bodyweight or lean mass?
For adults more than ~15% above their ideal weight, base the calculation on a reasonable target bodyweight or on lean body mass, not current total weight. Otherwise the number gets unnecessarily high. A 100 kg adult with 40% body fat doesn't need 220 g of protein — they need ~140–160 g, calculated against a 70–80 kg target weight. The protein calculator at /tools/protein adjusts for this automatically.
Do I need protein powder, or can I get it all from food?
You can absolutely hit any reasonable protein target from food alone — eggs, chicken, fish, paneer, dal+rice, soya, Greek yogurt, lentils. Protein powder is a convenience, not a requirement. The main case for whey or casein is the per-meal math: if your target is 180 g and you can only realistically eat 30–35 g per meal from whole food without feeling stuffed, a shake bridges the gap. For most people at 100–150 g/day, whole food handles it.
Is 'too much' protein dangerous?
In adults with healthy kidneys, no. Studies have followed resistance-trained adults at 3.0–4.4 g/kg for up to a year with no clinically significant kidney impact (Antonio 2014). The genuine ceiling is the calorie one — at very high intakes, protein still has calories and will push you out of your daily target. If you have existing kidney disease, diabetes, or controlled-but-marginal blood pressure, get baseline kidney bloods (creatinine, eGFR) before pushing past 2 g/kg and work with a doctor.
What about plant protein — does it count the same as whey or chicken?
Gram-for-gram, plant protein triggers slightly less MPS at the same dose, because plant proteins are typically lower in leucine (the key trigger amino acid) and have lower digestibility scores (DIAAS). The fix is straightforward: vegetarians and vegans should aim for ~15–20% higher total daily protein and ~30–40 g per meal rather than 25–30, and emphasise the higher-quality plant sources (soya, paneer, tofu, dal+rice combinations). Once the dose is adjusted, long-term outcomes are similar.
Should I eat protein right after training? Is the 30-minute anabolic window real?
The 30-minute window is a myth in its strict form. The actual window for post-training protein intake is closer to 4–6 hours, and what matters is total daily protein and per-meal dosing, not the exact timing of the post-workout meal. That said, if you trained fasted or your last protein-containing meal was 4+ hours ago, eating 30–40 g of protein within 2 hours of training is sensible — it gives the muscle the amino acids it just signalled for. Don't sprint home from the gym to slam a shake.
If I'm over 50, do I really need more protein than my 25-year-old self?
Yes, slightly. The per-day target is broadly the same (1.6–2.0 g/kg if you train), but the per-meal target rises because of anabolic resistance — the same 25 g dose that triggered MPS in your 25-year-old self may not at 65. Aim for 35–45 g per meal across 3–4 meals, leucine-rich sources (animal protein, dairy, soya), and pair every meal with some resistance training during the week. This is the strongest single dietary lever against sarcopenia, with the geriatric literature consistent on it (PROT-AGE 2013).

References

[1]
Morton RW, Murphy KT, McKellar SR, 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. British Journal of Sports Medicine, 52(6):376-384.
View source
[2]
Helms ER, Zinn C, Rowlands DS, Brown SR (2014). A systematic review of dietary protein during caloric restriction in resistance trained lean athletes: a case for higher intakes. International Journal of Sport Nutrition and Exercise Metabolism, 24(2):127-138.
View source
[3]
Schoenfeld BJ, Aragon AA (2018). How much protein can the body use in a single meal for muscle-building? Implications for daily protein distribution. Journal of the International Society of Sports Nutrition, 15:10.
View source
[4]
Trommelen J, van Loon LJC (2016). Pre-sleep protein ingestion to improve the skeletal muscle adaptive response to exercise training. Nutrients, 8(12):763.
View source
[5]
Longland TM, Oikawa SY, Mitchell CJ, Devries MC, Phillips SM (2016). Higher compared with lower dietary protein during an energy deficit combined with intense exercise promotes greater lean mass gain and fat mass loss. American Journal of Clinical Nutrition, 103(3):738-746.
View source
[6]
Bauer J, Biolo G, Cederholm T, et al. (2013). Evidence-based recommendations for optimal dietary protein intake in older people: a position paper from the PROT-AGE Study Group. Journal of the American Medical Directors Association, 14(8):542-559.
View source
[7]
Antonio J, Peacock CA, Ellerbroek A, Fromhoff B, Silver T (2014). The effects of consuming a high protein diet (4.4 g/kg/d) on body composition in resistance-trained individuals. Journal of the International Society of Sports Nutrition, 11:19.
View source