The official answer is 0.8g per kilogram of body weight per day.
For an 85kg man, that’s 68 grams of protein.
That is the RDA — the Recommended Dietary Allowance — and it represents the minimum amount of protein required to prevent deficiency in a sedentary adult. It was not designed to optimize muscle mass, performance, body composition, or the demands of a physically and cognitively active lifestyle.
The actual amount of protein a man needs is significantly higher. Here’s the evidence behind the real numbers — and how to hit them without tracking.
Why the RDA is the wrong target
The RDA for protein was established through nitrogen balance studies — measuring protein intake versus nitrogen excretion to determine the minimum needed to avoid muscle breakdown.
This is a survival threshold, not a performance target. The distinction matters.
A man eating the RDA of protein will avoid clinical protein deficiency. He will not optimize muscle protein synthesis, preserve lean mass during a caloric deficit, support recovery from resistance training, or take advantage of protein’s powerful satiety effect.
For men with any of these goals — which is essentially every man who wants to look, feel, and perform better — the RDA is the floor, not the target.
What the research actually recommends
A large body of research on protein and body composition has established a working consensus for men with active lifestyles:
For muscle building and performance: 1.6–2.2g per kilogram of body weight per day. For an 85kg man, this is 136–187g daily.
For maintaining muscle during a caloric deficit: 2.0–2.4g per kilogram. Higher protein intake during weight loss is specifically protective against muscle loss — the body is more likely to burn stored fat when protein is adequate.
For men over 35: At the high end of the range. Anabolic resistance — the blunted muscle protein synthesis response in older men — means more protein is needed to generate the same signal that lower protein would produce in a younger man.
For sedentary men with no training: Even here, emerging research suggests 1.0–1.2g/kg is more appropriate than the 0.8g/kg RDA for maintaining muscle mass and metabolic health over time.
What this looks like in practice
For a man weighing 85kg with a goal of maintaining or building muscle:
Target: 1.8g/kg = 153g of protein per day.
Distributed across three meals, that’s approximately 50g of protein per meal.
What does 50g of protein look like?
- 200g (7oz) of chicken breast: ~46g
- 6 large eggs: ~36g (this meal needs a supplement — add Greek yogurt)
- 250g (9oz) of salmon: ~50g
- 300g (10.5oz) of cottage cheese: ~36g (add a protein shake or eggs)
- 200g Greek yogurt (full-fat, plain) + 2 eggs: ~34g (close; add a small protein supplement)
- 40g whey protein shake: ~30–35g (add eggs or yogurt to hit 50g)
These are not precision measurements. They are reference points. A man who eats substantial protein at every meal — without tracking grams — will typically land in the 130–180g range naturally, which is sufficient for most men’s goals.
Protein timing and distribution
Total daily protein matters most. But distribution has real effects on muscle protein synthesis that are worth understanding.
The muscle-building signal from protein is maximized with doses of approximately 30–50g of high-quality protein, with subsequent doses having diminishing additional effect above that range. This means spreading protein across three to four meals produces better outcomes than eating the same total in one or two large meals.
Practical implication: Three meals with 40–55g of protein each is better than one meal with 150g of protein. If you’re using intermittent fasting with a compressed eating window, eating three meals within that window rather than one or two will meaningfully improve the outcome.
Protein timing around training is less critical than protein distribution throughout the day, but having a protein source within two hours post-training does support recovery and muscle protein synthesis.
The best protein sources for busy men
Not all protein sources are equal. Completeness of the amino acid profile (presence of all essential amino acids) and leucine content (the amino acid that most strongly triggers muscle protein synthesis) are the relevant variables.
High-quality, high-leucine sources:
- Eggs (whole or whites)
- Chicken, turkey, beef, pork
- Salmon and other fatty fish
- Greek yogurt and cottage cheese
- Whey protein (highest leucine content per gram of any protein source)
Moderate-quality sources:
- Legumes (lower leucine; need higher quantities to trigger the same MPS response)
- Tofu and tempeh
- Canned fish (sardines, tuna, mackerel — cost-effective and convenient)
For busy men, the practical answer is: build meals around animal-source proteins. They are complete, convenient, and require minimal preparation (rotisserie chicken, Greek yogurt, eggs, canned fish).
The protein lever for weight loss specifically
Protein is uniquely valuable for men trying to lose weight for two reasons.
First, protein is the most satiating macronutrient by calorie. High-protein meals reduce hunger and suppress total calorie intake more effectively than high-carbohydrate or high-fat meals of equal caloric density. Men who increase protein intake typically eat less total food without trying.
Second, protein is metabolically expensive. The thermic effect of protein — the calories burned digesting and processing it — is 20–30% of its caloric content. Eating 200 calories of protein effectively costs 40–60 calories in digestion. Compare to fat (5–10% thermic effect) or carbohydrate (5–10%). Higher protein naturally shifts the energy equation in your favor.
The combination of higher satiety and higher thermic effect makes increasing protein intake one of the highest-return single dietary changes a man can make.
The bottom line
The RDA is not your target. It’s the minimum required to avoid deficiency.
For men who train, for men over 35, and for men trying to lose weight, the real target is 1.6–2.2g of protein per kilogram of body weight per day — distributed across three to four meals.
For an 85kg man, that’s 136–187g daily. For a 90kg man, 144–198g.
You don’t need to count it. You need to build the habit of having a substantial protein source at every meal — and choose protein sources that are complete, high-leucine, and practically accessible.
The single highest-value change most men can make to their nutrition is to double their protein intake.
