How Much Protein Do Men Really Need?

The question of how much protein men need generates more noise online than almost any other nutrition topic. Social media will tell you that you need a gram of protein per pound of bodyweight, a chicken breast in every meal and a shake the moment your gym session ends. The official Australian answer is calmer, and for most men, considerably lower. Australia’s Nutrient Reference Values set the Recommended Dietary Intake (RDI) for protein at 64 grams per day for men aged 19 to 70 — roughly 0.84 grams per kilogram of bodyweight. This guide breaks down where that number comes from, when active men genuinely need more, and how to tell whether your own intake is in the right range.

This article explains how much protein men need according to the official guidance, reviews what dietitians generally recommend for men who train, and flags the situations where professional advice is worth getting. It is general information, not personal medical advice — more on that at the end.

The Official Number: 64 Grams a Day

Australia’s protein recommendations come from the Nutrient Reference Values for Australia and New Zealand, published by the National Health and Medical Research Council (NHMRC). For adult men aged 19 to 70, the numbers are:

• Estimated Average Requirement (EAR): 0.68 g/kg of bodyweight per day — enough for about half the population
• Recommended Dietary Intake (RDI): 0.84 g/kg of bodyweight per day — enough for roughly 97 to 98% of men
• Translated to a reference man of about 76 kg: 52 g/day (EAR) and 64 g/day (RDI)

For men over 70, the RDI steps up to 1.07 g/kg per day (about 81 g for a reference-weight man), because older adults appear to need more protein to maintain muscle mass. The increase reflects evidence that muscle maintenance becomes less efficient with age, so a little extra protein helps protect strength and function.

It is worth understanding what the RDI is and is not. It is designed to cover the protein needs of nearly all healthy men at a population level — it is not a target to chase with a calculator, and it is not a ceiling. Most men reading this will find they already sit comfortably above it.

The Surprising Truth: Most Australian Men Already Eat Plenty

Here is the part that rarely makes it into gym-floor conversations. Data from the 2023 National Nutrition and Physical Activity Survey showed that Australian men eat, on average, around 103 grams of protein a day — well above the 64-gram RDI. The average bloke is not protein deficient; he is eating roughly 60% more protein than the official recommendation.

This makes sense when you look at typical Australian eating patterns. Meat, chicken, fish, eggs and dairy are staples in most households, and even breads, cereals and legumes contribute meaningful amounts across the day. Protein is rarely the limiting nutrient in an average Australian man’s diet.

So why the anxiety about hitting protein numbers? Partly it is marketing — the sports nutrition industry has every incentive to convince you that your steak-and-eggs breakfast somehow falls short. Partly it is because online fitness culture sets its benchmarks around people training very hard, several times a week, with muscle gain as the explicit goal. That describes some men, but not most. If you are moderately active and eat a normal mix of foods, your protein intake is very likely fine.

When Men Genuinely Need More Protein

The RDI covers basic health for the general population. There are situations where a dietitian or sports dietitian would reasonably recommend going above it:

Men doing regular resistance training

A widely cited meta-analysis (Morton et al., British Journal of Sports Medicine, 2018; 49 trials, 1,863 participants) found that additional protein modestly improved lean-mass gains, with a modelled breakpoint around 1.6 g/kg per day. In plain terms, men lifting weights three or more times a week for muscle growth often aim for roughly 1.2 to 1.6 g/kg per day — for an 80 kg man, that is about 95 to 130 g of protein daily. Above that level, the same research suggests little extra benefit, and the returns shrink fast. The training itself does the heavy lifting (pun intended); protein simply supports the adaptation.

Men over 70

The higher official RDI for men over 70 (1.07 g/kg/day) exists because older muscle responds less efficiently to protein — a phenomenon researchers call anabolic resistance. For a 75 kg man in his seventies, that is about 80 g of protein a day. Spreading protein evenly across meals matters more here, since older muscle seems to respond best to a decent dose (around 25-30 g) at each meal rather than one enormous dinner serving.

Men losing weight

During a calorie deficit, protein intake slightly above the RDI helps preserve muscle while fat comes off. This is one of the more consistent findings in nutrition research. Men dieting who keep protein up and keep lifting tend to lose a greater share of fat and hold onto more muscle than those who simply eat less of everything.

Men recovering from illness or injury

Surgery, serious illness and significant injuries raise protein needs while the body repairs tissue. This is medical territory — a GP or dietitian should set the numbers.

For everyone else — the desk worker who plays social footy on weekends, the dad who runs twice a week — the RDI plus a normal appetite is typically plenty. No calculator required.

How to Work Out Your Own Number

If you want a rough personal estimate of how much protein men need in your case, start with your bodyweight in kilograms and multiply:

• Most men (average activity): bodyweight × 0.84 = your RDI in grams
• Men lifting regularly for muscle: bodyweight × 1.2 to 1.6 = a sensible training range
• Men over 70: bodyweight × 1.07 = your RDI in grams

A few worked examples: a 75 kg man with a desk job lands at about 63 g/day. The same man training hard three times a week lands at about 90 to 120 g/day. A 90 kg man who lifts lands at about 110 to 145 g/day.

One caveat: these formulas use total bodyweight. For men carrying significant excess body fat, dietitians sometimes calculate targets from a healthy or lean reference weight instead, so the number does not inflate unnecessarily. If that describes you and you are training seriously, an Accredited Practising Dietitian can set a number properly rather than leaving you guessing.

How Much Protein Is in Real Food?

Translating grams into meals is where most men find the number stops being intimidating. A rough guide to protein in common Australian foods:

• 100 g cooked chicken breast: about 30 g protein
• 100 g cooked lean beef steak: about 25 g protein
• 100 g cooked salmon: about 20 g protein
• 100 g can of tuna in springwater: about 24 g protein
• 2 large eggs: about 12 g protein
• 250 ml glass of milk: about 8 g protein
• 200 g tub of Greek yoghurt: about 18-20 g protein
• ½ cup cooked lentils: about 9 g protein
• ½ cup cooked kidney beans: about 8 g protein
• 100 g firm tofu: about 7-8 g protein
• 2 slices wholegrain bread: about 8 g protein
• 30 g handful of almonds: about 6 g protein

Now stack a normal day: eggs on toast for breakfast (about 20 g), a chicken and salad sandwich at lunch (about 35 g), a handful of nuts as a snack (about 6 g), and a salmon fillet with vegetables for dinner (about 35 g). That is roughly 95 g of protein without a single supplement, powder or special effort. This is why the average Australian man hits 103 g without trying.

Plant-based men need to pay slightly more attention, because most plant proteins are a little lower in some essential amino acids. Combining different sources across the day — legumes with grains, soy products, nuts and seeds — covers the gap comfortably. There is no need to combine proteins in the same meal; variety across the day is enough.

Timing: Does It Matter When You Eat Protein?

The short answer: total daily intake matters far more than timing. The long-standing gym myth of a narrow “anabolic window” that slams shut 30 minutes after training has not held up well. The body remains receptive to protein for hours after a session, and what counts most is eating enough across the day.

That said, spreading protein reasonably evenly across meals is a sensible habit, particularly for older men. Research on muscle protein synthesis suggests the body can only use a certain amount of protein per meal for muscle building — roughly 25 to 40 g depending on body size — so four meals of 30 g beats one meal of 120 g for muscle purposes. Practically, this just means including a proper protein source at breakfast, lunch and dinner rather than loading it all into dinner. Our guide to pre and post workout nutrition covers the training-day details in full.

Can You Eat Too Much Protein?

For healthy men, the body handles generous protein intakes well. Excess protein is broken down and excreted; the body does not store it as a reserve the way it stores fat or carbohydrate. There is no official upper limit for protein in the Australian Nutrient Reference Values, and the evidence on kidney effects in healthy people is reassuring. Men with existing kidney disease or reduced kidney function should keep protein intake within the range their doctor advises, and that is a medical conversation, not a gym-floor one.

Signs You Might Not Be Getting Enough

Genuine protein deficiency is rare in Australia, but inadequate intake relative to your goals is possible, particularly for men who skip meals, eat very little meat or dairy, or train hard on a light diet. Worth-noting signs include:

• Muscle loss or weakness despite regular training
• Slow recovery — soreness that lingers for days after ordinary sessions
• Constant hunger and grazing, even after meals
• Hair thinning, brittle nails or slow wound healing (these have many causes, but diet is on the list)
• Frequent illness during heavy training blocks

None of these diagnoses protein intake on its own — all have multiple possible causes. But if several sound familiar and your meals are light on protein sources, it is a reasonable prompt to track your intake for a week and, if needed, talk to your GP or an Accredited Practising Dietitian. You can find one through Dietitians Australia.

The Bottom Line

That is the short answer to how much protein men need: most Australian men need about 64 grams of protein a day, and most already eat considerably more. Men training hard for muscle gain do well in the range of 1.2 to 1.6 g/kg per day; men over 70 have a higher official RDI of 1.07 g/kg per day. Total intake beats timing, variety beats powders, and the humble egg, can of tuna and tub of yoghurt will cover most men’s needs without drama. If you are unsure where you sit, a week’s honest food tracking — or one session with a dietitian — will answer it faster than any supplement.

FAQs

How much protein men need per day in Australia?

Australia’s official RDI is 64 g/day (0.84 g/kg of bodyweight) for men aged 19-70, and 81 g/day (1.07 g/kg) for men over 70. Men doing regular resistance training for muscle gain typically do well at 1.2-1.6 g/kg/day. Most Australian men already eat around 100 g/day without supplements.

Is 100 grams of protein a day too much for a man?

No. For an average man, 100 g/day is comfortably within what the body handles easily and matches what Australian men already eat on average. It is above the 64 g RDI but well within normal dietary ranges, and there is no official upper limit for protein in healthy adults.

Do older men need more protein?

Yes. Men over 70 have a higher official RDI of 1.07 g/kg per day (about 81 g for a reference-weight man) because ageing muscle responds less efficiently to protein. Spreading protein evenly across meals, with around 25-30 g at each, appears to work best for maintaining strength in older age.

Can men get enough protein without supplements?

Absolutely. A normal day of eggs on toast, a chicken sandwich, nuts and a salmon dinner delivers roughly 95 g of protein. Supplements are a convenience, not a necessity — the body cannot tell whether amino acids came from a steak or a shake. Our protein powder comparison covers when a shake actually makes sense.

Should men eat protein straight after a workout?

It helps to eat protein within a few hours of training, but the old ’30-minute anabolic window’ is overstated. What matters most is your total daily intake and a protein source at each meal. A meal with 25-40 g of protein any time in the hours around training covers it.

Disclaimer: This article is general information only and not medical advice. Protein needs vary with health conditions, medications and training goals. If you have kidney disease, diabetes or any chronic condition, or you are considering large changes to your diet, talk to your GP or an Accredited Practising Dietitian first.