Most men need between 56 and 90 grams of protein per day, though the right number depends on your body weight, activity level, and age. The baseline recommendation is 0.8 grams per kilogram of body weight (0.36 grams per pound), which works out to about 65 grams for a 180-pound man. But that number is a minimum to prevent deficiency, not an optimal target, and many men benefit from eating significantly more.
The Baseline: 0.8 Grams per Kilogram
The Recommended Dietary Allowance for protein is 0.8 grams per kilogram of body weight per day. For a quick estimate, multiply your weight in pounds by 0.36. A 160-pound man lands at about 58 grams; a 200-pound man, roughly 72 grams. This amount covers basic metabolic needs, keeping your immune system functioning and your existing muscle tissue maintained under sedentary conditions. It’s the floor, not the ceiling.
Most American men already exceed this number without trying. A chicken breast, a cup of Greek yogurt, and a couple of eggs gets you past 60 grams before dinner. So if you’re relatively inactive and not trying to change your body composition, the RDA is likely sufficient and easy to hit through a normal diet.
How Exercise Changes the Math
If you lift weights, run, cycle, or play sports regularly, 0.8 grams per kilogram isn’t enough. Major sports nutrition organizations recommend 1.2 to 2.0 grams per kilogram per day for most athletes. Where you land in that range depends on what kind of exercise you do.
Endurance athletes (runners, cyclists, swimmers) generally need 1.4 to 1.8 grams per kilogram. Prolonged cardio burns through amino acids for fuel, and higher protein intake helps offset that loss and supports recovery. For a 180-pound endurance athlete, that translates to roughly 115 to 147 grams daily.
Strength-trained men aiming to build muscle benefit from the higher end: 1.6 to 2.2 grams per kilogram. For a 180-pound lifter, that’s about 131 to 180 grams per day. Going above 2.2 grams per kilogram doesn’t appear to add meaningful muscle-building benefit under normal circumstances. The exception is during aggressive fat loss phases, where protein needs can climb even higher (more on that below).
Protein Needs After 50
Your body gets worse at converting dietary protein into muscle as you age. Starting around your 50s, you lose muscle mass at a rate of roughly 1 to 2 percent per year if you don’t actively work against it. This gradual loss, called sarcopenia, is a major driver of frailty, falls, and loss of independence later in life.
The European Society for Clinical Nutrition and Metabolism recommends that healthy older adults eat at least 1.0 to 1.2 grams of protein per kilogram daily, a meaningful step up from the standard RDA. Men dealing with chronic illness or recovering from injury may need 1.2 to 1.5 grams per kilogram. For a 180-pound man over 65, that minimum shifts from about 65 grams to 82 to 98 grams per day.
Older adults also appear to need more protein per meal to get the same muscle-building response a younger person gets. Research suggests that meals containing at least 25 to 30 grams of protein are more effective at stimulating muscle repair in older men, compared to the 20 grams that works well for younger adults. Spreading protein evenly across three or four meals matters more as you age than front-loading it at dinner.
Protein During Weight Loss
When you’re eating fewer calories than you burn, your body doesn’t just pull from fat stores. It breaks down muscle tissue too, especially if protein intake is low. Eating more protein during a caloric deficit is one of the most reliable ways to preserve the muscle you already have while losing fat.
Guidelines for muscle preservation during weight loss recommend roughly 0.7 to 1.0 grams of protein per pound of body weight. That’s significantly higher than the RDA. A 200-pound man trying to lose weight would aim for 140 to 200 grams of protein daily. Resistance-trained athletes cutting weight aggressively may need even more, up to about 1.4 grams per pound of lean body mass, to hold onto muscle.
Distributing that protein across the day matters here. Your body can effectively use about 25 to 40 grams of protein per meal for muscle repair and maintenance. Eating 80 grams at dinner and skipping breakfast is less effective than spreading four 30-gram servings across the day.
Can You Eat Too Much Protein?
For men with healthy kidneys, moderate increases above the RDA are well tolerated. Most research on athletes eating 1.6 to 2.2 grams per kilogram for months or years shows no kidney damage. However, the picture isn’t entirely risk-free at very high intakes. Population studies have found that people in the highest quartile of protein consumption show faster decline in kidney filtration rates compared to those eating the least protein, even among healthy adults.
This doesn’t mean eating chicken breast will destroy your kidneys. It does mean that consistently pushing well beyond 2.2 grams per kilogram without a specific athletic reason offers diminishing returns and potentially unnecessary strain. Men with existing kidney disease or only one functioning kidney should keep intake at or below the RDA of 0.8 grams per kilogram unless directed otherwise by a doctor.
Quick Reference by Body Weight
- 150-pound man, sedentary: ~54 grams per day
- 150-pound man, active: ~82 to 136 grams per day
- 180-pound man, sedentary: ~65 grams per day
- 180-pound man, active: ~98 to 164 grams per day
- 200-pound man, sedentary: ~72 grams per day
- 200-pound man, active: ~109 to 182 grams per day
- Men over 65 (any weight): multiply body weight in kg by 1.0 to 1.2
These ranges use 0.8 g/kg for sedentary and 1.2 to 2.0 g/kg for active men. If you’re lifting weights specifically to build muscle, aim for the upper half. If you’re doing moderate cardio a few times a week, the lower half of the active range is a reasonable target.
Practical Ways to Hit Your Target
Whole foods are the most straightforward path. A palm-sized portion of chicken, fish, or beef provides roughly 25 to 30 grams of protein. Two eggs add about 12 grams. A cup of Greek yogurt delivers 15 to 20 grams. A cup of cooked lentils gives you around 18 grams. For most men targeting 100 to 150 grams per day, three meals with a solid protein source and one high-protein snack will get you there.
Protein powder isn’t necessary, but it’s a convenient way to close a gap. A typical scoop of whey protein provides 20 to 25 grams. It’s useful when whole-food options aren’t available or when you’re struggling to hit higher targets during weight loss or heavy training phases. The source of protein, whether from meat, dairy, legumes, or supplements, matters less than hitting a consistent daily total and spreading it across meals.