Most men need between 56 and 91 grams of protein per day, depending on body weight and activity level. The baseline recommendation is 0.8 grams per kilogram of body weight (or 0.36 grams per pound), which covers basic nutritional needs for a sedentary adult. For a 180-pound man, that works out to about 65 grams. But if you exercise regularly, want to lose fat, or are over 65, your target is likely higher.
The Baseline for Sedentary Men
The Recommended Dietary Allowance of 0.8 grams per kilogram of body weight is designed to prevent deficiency in healthy adults who aren’t particularly active. It’s a floor, not a ceiling. For a 154-pound (70 kg) man, that’s 56 grams. For a 200-pound (91 kg) man, it’s about 73 grams. Most men eating a typical Western diet already hit this number without trying, since a single chicken breast contains roughly 30 grams of protein.
That said, the RDA was set to meet the minimum needs of 97.5% of the population. It wasn’t optimized for muscle retention, body composition, or satiety. Many nutrition researchers now consider it too low for men who want to do more than just avoid a deficiency.
If You Lift Weights or Train Hard
Men who regularly lift weights or train for endurance events like running or cycling need 1.2 to 1.7 grams per kilogram of body weight. For a 180-pound man, that translates to roughly 98 to 139 grams per day. The lower end of this range suits moderate recreational exercise, while the higher end applies to serious strength training or heavy endurance loads.
The reason the number jumps so much is that exercise damages muscle fibers, and your body needs amino acids to repair and rebuild them. Without enough protein, you’re still recovering but not growing. If you’re consistently training and eating below 1.2 grams per kilogram, you’re likely leaving progress on the table.
If You’re Trying to Lose Weight
Protein becomes even more important during a calorie deficit. When you eat less than your body burns, you lose both fat and muscle unless you actively protect lean mass with adequate protein. A controlled trial comparing energy-restricted diets found that people eating 30% of their calories from protein reported significantly more satisfaction and less hunger than those eating 15% protein, even though total calories were the same. They also retained more lean tissue, as measured by nitrogen balance.
In practical terms, if you’re a 180-pound man eating 1,800 calories to lose weight, 30% of calories from protein means about 135 grams per day. That’s well above the RDA but aligns closely with the strength-training range. Combining higher protein with resistance training during a cut is the most reliable way to keep muscle while shedding fat.
Protein Needs After 60
Older men face a biological disadvantage: their muscles become less responsive to protein. A meal that would trigger robust muscle repair in a 25-year-old produces a weaker response in a 65-year-old. Research shows that older adults need at least 30 grams of high-quality protein per meal (containing roughly 3 grams of the amino acid leucine) just to switch on the muscle-building process effectively.
For men with age-related muscle loss (sarcopenia), the recommended intake jumps to 1.2 to 1.5 grams per kilogram daily, with some guidelines suggesting up to 2.0 grams per kilogram for those dealing with serious illness or significant muscle wasting. For a 170-pound man, that’s 93 to 116 grams per day at the moderate end. This is nearly double the standard RDA, which is why many older men who think they’re eating “enough” protein are actually falling short of what their bodies need to maintain strength and independence.
How to Spread It Across the Day
Your body can only use so much protein at once for muscle repair. Research on younger men shows a roughly proportional response up to about 30 to 35 grams per meal. Beyond that, the muscle-building signal doesn’t increase much. This means eating 90 grams of protein at dinner and skipping it at breakfast is less effective than splitting your intake across three or four meals.
A simple approach: aim for 25 to 40 grams of protein at each meal. That might look like eggs and Greek yogurt at breakfast, a chicken or bean-based lunch, and fish or beef at dinner, with a high-protein snack if needed. This even distribution keeps muscle repair active throughout the day rather than concentrating it in a single window.
Plant Protein vs. Animal Protein
Animal sources like meat, fish, eggs, and dairy contain higher concentrations of leucine, the amino acid that triggers muscle repair. Most plant proteins are lower in leucine and may also be harder for your body to digest and absorb fully. This doesn’t mean plant-based diets can’t meet your needs, but the strategy changes.
If you rely primarily on plant sources, you can compensate by eating a larger total amount of protein, combining different sources (like rice and beans) to get a complete amino acid profile, or choosing plant proteins that are naturally higher in leucine, such as soy. Adding just a few grams of supplemental leucine to a plant-based meal can produce muscle-repair responses comparable to animal protein. The key takeaway: plant-based men may need to aim for the higher end of their target range to get the same muscle-building benefit.
Is There an Upper Limit?
There’s no formally established upper limit for protein in healthy men, but most experts suggest keeping intake at or below 2.0 grams per kilogram of body weight (about 0.9 grams per pound). For a 180-pound man, that’s roughly 164 grams. Going beyond this doesn’t appear to offer additional muscle-building benefits for most people, and very high protein diets are associated with an increased risk of kidney stones.
Men with existing kidney disease should be cautious, since high protein intake forces the kidneys to work harder to filter waste products. But for healthy men with no kidney issues, intakes in the 1.2 to 2.0 grams per kilogram range have not been shown to cause kidney damage.
Quick Reference by Body Weight
- 150-pound (68 kg) man: 54 g (sedentary), 82–116 g (active), 82–102 g (over 65)
- 180-pound (82 kg) man: 65 g (sedentary), 98–139 g (active), 98–123 g (over 65)
- 200-pound (91 kg) man: 73 g (sedentary), 109–155 g (active), 109–137 g (over 65)
- 220-pound (100 kg) man: 80 g (sedentary), 120–170 g (active), 120–150 g (over 65)
These ranges use 0.8 g/kg for sedentary, 1.2–1.7 g/kg for active men, and 1.2–1.5 g/kg for men over 65. If you’re both active and over 65, aim for the higher end of the active range.