How much protein do men actually need?

The U.S. and Canadian adult RDA is 0.8 g/kg/day. It is designed to cover nearly all healthy adults, not to define the amount that maximizes gains from resistance training. The EFSA adult reference is similar at 0.83 g/kg/day.

Training, age and energy restriction can justify different planning ranges. Those are goal- and population-specific recommendations rather than proof that the adult RDA is merely a deficiency threshold.

The numbers that match your goal

Your situation	Daily protein	For an 85 kg man
General health, little training	0.8 g/kg (adult RDA)	About 70 g
Active, keeping the muscle you have	1.2–1.6 g/kg	100–135 g
Training to build muscle	1.6–2.0 g/kg	135–170 g
Energy deficit	Depends on leanness, deficit size and resistance training; do not apply athlete ranges universally	Individualize from the relevant adult or training range
Over 65, not especially active	At least 1.0–1.2 g/kg	85–100 g
Over 65 and training	At least 1.2 g/kg, often more	100 g and up

The International Society of Sports Nutrition considers 1.4 to 2.0 g/kg/day sufficient for most exercising adults. This is sports-nutrition guidance, not a universal requirement for every adult.

Where the returns become uncertain

A meta-analysis of 49 resistance-training studies and 1,863 participants estimated a modeled breakpoint near 1.62 g/kg/day, with a wide 95% confidence interval of 1.03 to 2.20 g/kg/day. It is not a universal requirement, ceiling or safety limit; it describes where additional average benefit became difficult to detect in that dataset.

For an 85 kg man, 1.6 g/kg is about 136 g and 2.0 g/kg is 170 g. Evidence during an energy deficit depends on leanness, deficit size, resistance training and whether intake is scaled to body weight or fat-free mass. Higher recommendations from lean, resistance-trained athletes should not be generalized to every person losing weight.

A man preparing food at a kitchen island, with salmon, eggs, chickpeas, beans and yogurt laid out on the counter. — Portions that land near 20 to 30 g: a salmon fillet, three eggs, a large tub of Greek yogurt, lentils with cheese.

How to spread it across the day

Total daily intake and resistance training matter most. Spreading protein can be practical, but long-term evidence that an equal distribution adds muscle beyond an adequate daily total is mixed.

About 0.25 to 0.4 g/kg per meal, often 20 to 40 g, every three to four hours is a practical heuristic rather than a mandatory rule.

Use defined portions rather than assuming every item supplies the same amount. For example, a cooked 100 g chicken breast or salmon portion commonly supplies roughly 20 to 30 g; three large eggs supply closer to 18 to 20 g; yogurt, lentils and cheese vary substantially by serving and product. Check the label or food database when the number matters.

Timing around training is a smaller lever than total daily intake. A 2025 direct-comparison meta-analysis found no important lean-mass difference between pre- and post-workout protein. A convenient meal near training is reasonable, but there is no narrow mandatory window.

After 65, guidance usually recommends more

For adults over 65, the PROT-AGE expert group recommends 1.0 to 1.2 g/kg/day for many healthy older people, at least 1.2 g/kg/day for active older adults, and 1.2 to 1.5 g/kg/day during many illnesses. These are optimization recommendations, not the official population RDA, and CKD, dialysis, frailty and sarcopenia require individual targets.

Protein alone will not hold muscle in place. It works when there is a training stimulus for it to support, which is the argument made in our guide to muscle loss with age.

The kidney question

Trials in adults without chronic kidney disease generally have not shown a worse short- or medium-term change in kidney function with higher protein intakes, but they do not establish unlimited or decades-long safety at very high intake.

Kidney disease is different. KDIGO 2024 commonly uses 0.8 g/kg/day for adults with CKD G3 to G5 and advises adults at risk of progression to avoid more than 1.3 g/kg/day. Dialysis, frailty and sarcopenia can change the target, so use clinician or renal-dietitian guidance.

The more realistic downsides of a very high protein diet are dull ones. It crowds out fiber and carbohydrate, it costs money, and it is hard to sustain, which matters more than any theoretical risk.

A man buying fish, eggs, cheese and olives at a covered market stall. — Powder is a convenience. What food buys you is everything that comes attached to the protein.

Food first, powder second

Protein powder is a convenience, not a requirement. It is useful when you cannot get a meal in, appetite is low, or you are short by 20 or 30 g at the end of the day. When total amount and protein quality are comparable, a powder is not inherently better for muscle outcomes; its advantages are convenience, predictable dosing and sometimes appetite tolerance. Creatine answers a different question and has its own evidence base.

Whey is convenient and leucine-rich, but it is not required. Adequately dosed soy, pea, blended plant proteins and mixed plant diets can support comparable strength and absolute lean-mass outcomes when total protein and essential amino acids are adequate.

These general bands apply to healthy adult men. Under-18s and people who are pregnant or breastfeeding, have CKD, serious liver disease, an eating disorder or a clinician-prescribed diet need individualized advice rather than a generic calculator target.

What food quality buys you is everything that comes attached. Harvard's nutrition team makes the point that the source matters as much as the amount, favoring fish, poultry, beans, nuts and legumes over red and processed meat.

Shopping bags of vegetables, bread and eggs standing in a hallway by an open door, with trainers on the floor. — Fix breakfast and lunch first. For most men that is the whole gap.

What to do this week

Work out your range. Use 0.8 g/kg as the general adult reference intake, 1.0–1.2 g/kg if you are over 65, and roughly 1.4–2.0 g/kg if you train regularly. Our protein calculator multiplies your weight by a self-selected general planning band; it does not measure training load.
Count one ordinary day. Most men find the total is acceptable and the timing is not.
Fix breakfast and lunch first. Getting 25 to 30 g into each of those is usually the whole gap.
Do not turn one estimate into a ceiling. Around 1.6 g/kg is a sensible anchor; needs and study uncertainty extend above it, while more is not automatically better.
Train. Protein supports muscle. Resistance training is what asks for it.

Frequently asked questions

How much protein does a man need per day?

The adult RDA is 0.8 g/kg/day and is designed to cover nearly all healthy adults. For most exercising adults, the ISSN considers 1.4 to 2.0 g/kg/day sufficient. A resistance-training meta-analysis estimated a modeled breakpoint near 1.62 g/kg/day with a wide 95% confidence interval of 1.03 to 2.20; those values are not universal requirements, ceilings or safety limits.

Is 200 g of protein a day too much?

Convert it by body weight and context. For a 90 kg man, 200 g is about 2.2 g/kg, above the 1.4 to 2.0 g/kg range considered sufficient for most exercising adults. No established adult upper limit does not mean unlimited intake is proven safe, and long-term evidence at very high intakes is limited. Medical conditions and prescribed diets can require much lower or different targets.

Does high protein damage your kidneys?

Short- and medium-term trials in adults without CKD generally have not shown a worse change in kidney function, but they do not prove unlimited long-term safety. KDIGO 2024 commonly uses 0.8 g/kg/day for CKD G3 to G5 and advises people at risk of progression to avoid more than 1.3 g/kg/day; dialysis, frailty and sarcopenia need individualized targets.

Do older men need more protein or less?

For many adults over 65, the PROT-AGE expert group recommends 1.0 to 1.2 g/kg/day, and at least 1.2 g/kg/day for active older adults. These are optimization recommendations rather than the official adult RDA. CKD, dialysis, frailty, sarcopenia and illness can change the target, so individual guidance matters.