Most men need between 56 and 91 grams of protein per day, depending on body weight, age, and activity level. The baseline recommendation is 0.8 grams per kilogram of body weight (0.36 grams per pound), which works out to about 56 grams for a 154-pound sedentary man. But that baseline is a minimum to prevent deficiency, not an optimal target, and most active men benefit from 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. To find your number, multiply your weight in pounds by 0.36. A 180-pound man lands at about 65 grams; a 200-pound man, roughly 72 grams. This figure represents the amount needed to meet basic nutritional requirements and avoid muscle wasting in a sedentary adult. It is not designed for men who exercise regularly, want to build muscle, or are over 65.
Protein for Building Muscle
If you’re lifting weights and trying to gain muscle, the research points to a clear threshold. A large meta-analysis published in the British Journal of Sports Medicine, covering 49 studies and over 1,800 participants, found that muscle gains plateaued at 1.6 grams of protein per kilogram of body weight per day. Beyond that point, additional protein didn’t produce additional muscle. For a 180-pound man, that’s about 131 grams daily.
The confidence interval on that plateau ranged from 1.03 to 2.2 grams per kilogram, which is why you’ll often see the upper end recommended as a safe target. Eating around 2.2 grams per kilogram (1 gram per pound of body weight) gives you a comfortable buffer to ensure you’re not leaving gains on the table. For the same 180-pound man, that ceiling sits at roughly 180 grams per day. Going above that amount isn’t harmful for healthy individuals, but it’s unlikely to help you build more muscle.
Protein Needs by Activity Type
Your ideal intake depends on what kind of exercise you do, not just whether you exercise at all.
- Sedentary or lightly active: 0.8 grams per kilogram (the RDA baseline).
- Regular moderate exercise (recreational sports, gym 3 to 4 times a week): 1.2 to 1.4 grams per kilogram.
- Endurance training (distance running, cycling, swimming): 1.2 to 1.4 grams per kilogram. Endurance athletes break down muscle during long sessions and need extra protein for repair, even though they aren’t primarily chasing size.
- Strength training or muscle gain: 1.6 to 2.2 grams per kilogram.
For a 180-pound man, these ranges translate to roughly 65 grams at the low end and up to 180 grams at the high end. Most men who work out regularly and want to stay lean will land somewhere in the 100 to 150 gram range.
Why Older Men Need More
After about age 65, your body becomes less efficient at using dietary protein to maintain and build muscle. This gradual loss of muscle mass, called sarcopenia, accelerates with each decade and increases the risk of falls, fractures, and loss of independence. The PROT-AGE study group, an international panel of geriatric nutrition experts, recommends that healthy men over 65 consume at least 1.0 to 1.2 grams of protein per kilogram daily. That’s 25 to 50 percent more than the standard RDA.
Men over 65 dealing with chronic illness or recovering from surgery or injury may need 1.2 to 1.5 grams per kilogram, and severe illness can push the requirement even higher. The key point: the standard 0.8 gram recommendation is often inadequate for aging men trying to preserve strength and mobility.
How to Spread Protein Across the Day
Your body can only ramp up muscle repair so fast at any one time. Research suggests that 20 to 40 grams of protein per meal, or about 0.3 grams per kilogram of body weight, is the amount that maximally triggers muscle protein synthesis in a single sitting. Eating 80 grams of protein at dinner and 10 at breakfast is less effective for muscle maintenance than distributing it more evenly across three or four meals.
That said, the old idea that your body “wastes” protein beyond 30 grams per meal is overstated. Your gut absorbs 91 to 95 percent of the protein you eat, regardless of how much you consume at once. Excess protein doesn’t vanish; it simply digests more slowly. Studies on intermittent fasting have shown that people eating all their protein in a compressed window retained just as much lean mass as those eating more frequently. So while spreading protein across meals is a good default strategy, eating a large portion in one sitting isn’t a problem. Total daily intake matters more than perfect meal-by-meal timing.
What Protein-Rich Foods Actually Deliver
Knowing your target in grams is only useful if you can estimate what’s on your plate. Here’s what common foods provide:
- Chicken breast (3 oz, cooked): 18 grams of protein, 101 calories. One of the most protein-dense foods available.
- Eggs (1 large): 6 grams of protein, 75 calories. You’d need three to four eggs to match a single chicken breast.
- Lentils (½ cup, boiled): 9 grams of protein, 115 calories. A solid plant-based option, though you need roughly twice the volume to match animal sources.
- Greek yogurt (1 cup): roughly 15 to 20 grams, depending on the brand.
- Whey protein powder (1 scoop): typically 20 to 25 grams. Useful for hitting daily targets when whole-food meals fall short.
A practical example: a 180-pound man aiming for 130 grams per day could hit that with two eggs at breakfast (12 g), a chicken breast and lentils at lunch (27 g), a Greek yogurt snack (17 g), a protein shake after training (25 g), and a 6-ounce portion of fish or beef at dinner (roughly 40 to 50 g). That’s 121 to 131 grams without any elaborate meal planning.
Is Too Much Protein Dangerous?
For healthy men with normal kidney function, high-protein diets are not known to cause medical problems. This holds true even at intakes well above 2 grams per kilogram. The concern about protein “damaging” healthy kidneys has not been supported by evidence in people without pre-existing kidney disease.
The picture changes if you already have reduced kidney function, diabetes, or another condition that affects how your kidneys filter waste. Protein breakdown produces nitrogen-containing byproducts that kidneys must clear, and compromised kidneys may struggle with the extra load. If you have a diagnosed kidney condition, your protein target should be set with your doctor rather than a general guideline.
The more practical risk of very high protein intake is simply displacing other nutrients. If protein crowds out fruits, vegetables, fiber, and healthy fats, the overall quality of your diet suffers, even if your muscles are well-fed.