A 200-pound man needs somewhere between 72 and 180 grams of protein per day, depending on how active he is and what his goals are. That’s a wide range, so the right number for you depends on whether you’re sedentary, lifting weights, losing weight, or aging and trying to hold onto muscle.
The Baseline: 72 Grams Per Day
The Recommended Dietary Allowance for protein is 0.8 grams per kilogram of body weight, or about 0.36 grams per pound. For a 200-pound man (roughly 91 kilograms), that works out to about 72 grams of protein per day. This is the minimum amount needed to prevent deficiency in a sedentary adult, not an optimal target for health or fitness. The World Health Organization frames it similarly: 10 to 15 percent of total daily calories from protein, which lands around 50 to 75 grams on a 2,000-calorie diet.
Most nutrition researchers consider this number a floor, not a ceiling. If you’re physically active, trying to lose fat, or over 60, your body can use significantly more.
If You Exercise Regularly
Current sports nutrition guidelines recommend 1.2 to 2.0 grams per kilogram of body weight for physically active people. For a 200-pound man, that translates to roughly 109 to 182 grams per day. The recommendation applies to both strength and endurance athletes. Where you fall in that range depends on training intensity and frequency: someone lifting heavy four to five days a week and pushing for muscle growth should aim toward the upper end, while a recreational runner or someone doing moderate gym sessions can stay closer to the lower end.
The upper range (around 1.8 to 2.0 g/kg) is also recommended during periods of calorie restriction when you’re trying to maintain muscle mass, which brings us to the next scenario.
If You’re Trying to Lose Weight
Protein becomes even more important when you’re eating fewer calories than you burn. In a caloric deficit, your body breaks down both fat and muscle for energy unless you give it enough protein to protect lean tissue. Research on adults with overweight and obesity shows that protein intakes of 1.2 to 1.6 grams per kilogram per day preserve lean mass and improve body composition during weight loss, compared to the standard 0.8 g/kg. For a 200-pound man, that’s roughly 109 to 145 grams daily.
Below 1.0 g/kg per day (about 91 grams for you), there’s a measurably higher risk of losing muscle along with fat. Above 1.3 g/kg (around 118 grams), you’re more likely to actually gain muscle mass even while dieting. Protein also has a strong thermic effect: your body burns 20 to 30 percent of protein calories just digesting them, compared to 5 to 10 percent for carbohydrates and less than 3 percent for fat. That metabolic advantage makes higher protein intakes especially useful during a cut.
If You’re Over 60
Aging muscles become less efficient at using dietary protein, a phenomenon researchers call “anabolic resistance.” The standard RDA of 0.8 g/kg simply isn’t enough to prevent the gradual muscle loss (sarcopenia) that accelerates after 60. A 2025 study using precise amino acid tracking found that older adults with sarcopenia needed an average of 1.21 g/kg just to meet basic requirements, with a recommended intake of 1.54 g/kg per day. For a 200-pound man, that’s about 110 to 140 grams daily.
Older adults also need higher amounts of protein per meal to trigger the same muscle-building response that younger people get from smaller doses. Younger adults can maximally stimulate muscle repair with about 20 grams of protein in a sitting, but older adults typically need closer to 30 to 40 grams per meal to get the same effect.
How to Spread It Across the Day
Total daily protein matters most, but how you distribute it across meals makes a real difference. Eating roughly 30 grams of protein at each of three meals stimulates 24-hour muscle protein synthesis more effectively than the typical pattern most people follow: a protein-light breakfast (around 10 grams), a modest lunch (15 grams), and a heavy dinner (65 grams or more). Even when the total daily amount is identical, the even distribution produces better results.
Research shows the muscle-building benefit per meal plateaus somewhere around 30 to 45 grams of protein. Eating more than that in a single sitting isn’t wasted (your body still absorbs and uses the amino acids for other functions), but it won’t further accelerate muscle repair. So for a 200-pound man targeting 120 to 150 grams per day, three meals of 30 to 40 grams plus a protein-rich snack is a practical framework.
The quality of protein matters too. Each meal should deliver enough of the amino acid leucine, which acts as the main signal telling your muscles to start building. You need roughly 2.5 to 3 grams of leucine per meal to fully trigger that process. Animal proteins like eggs, chicken, beef, fish, and dairy are naturally high in leucine. Plant proteins can get you there, but you typically need larger portions or combinations to hit the same leucine threshold.
Is There a Safe Upper Limit?
The concern most people have heard is that too much protein damages the kidneys. For healthy adults with no pre-existing kidney disease, moderate increases above the RDA (up to about 1.6 g/kg, or roughly 145 grams for a 200-pound man) are well-supported by the research and not associated with kidney problems.
At very high intakes, above 2.0 g/kg per day (over 180 grams), the picture gets murkier. A review in the Journal of Renal Nutrition raised concerns that sustained high-protein diets, particularly those based heavily on meat and dairy, can increase kidney filtration pressure, raise sodium intake, and elevate the risk of kidney stones. These effects could, over time, contribute to kidney issues even in people who started out healthy. The WHO also notes that excessive protein places a metabolic burden on the kidneys.
For most 200-pound men, staying in the 100 to 160 gram range covers virtually every goal, from general health to serious strength training, without pushing into territory where risk starts to outweigh benefit.
Quick Reference by Goal
- Sedentary, general health: 72 to 90 grams per day (0.8 to 1.0 g/kg)
- Moderate exercise: 109 to 136 grams per day (1.2 to 1.5 g/kg)
- Intense training or muscle building: 145 to 182 grams per day (1.6 to 2.0 g/kg)
- Weight loss while preserving muscle: 109 to 145 grams per day (1.2 to 1.6 g/kg)
- Over 60, preventing muscle loss: 110 to 140 grams per day (1.2 to 1.5 g/kg)