How Much Protein Do You Need?
Protein is the most important macronutrient for body composition — it builds and repairs muscle tissue, keeps you full, and has a higher thermic effect than carbs or fat. But "how much" depends on your weight, how active you are, and what you're trying to achieve.
How much protein per day to build muscle?
The evidence-based range for maximizing muscle protein synthesis is 1.6–2.2g of protein per kilogram of body weight per day (roughly 0.7–1g per pound). Below 1.6g/kg, gains are slower but still possible. Above 2.2g/kg, there's diminishing return for most people, though higher intakes are not harmful. Spread your intake across 3–4 meals for best use by the body.
How much protein should I eat to lose weight?
When in a caloric deficit, protein becomes even more important. Eating 1.6g/kg or higher helps your body preserve lean muscle mass while burning fat. High protein intake also increases satiety (you feel fuller longer), which makes sticking to a deficit easier. Many coaches recommend going as high as 2.0–2.4g/kg during a cut.
Is eating too much protein bad for you?
For healthy individuals with normal kidney function, high protein intakes up to 3g/kg per day have not been shown to cause kidney damage in research studies. The kidneys in healthy people adapt to higher protein loads efficiently. However, if you have existing kidney disease or reduced kidney function, consult your doctor before significantly increasing protein intake.
Frequently asked questions
How much protein do I need per day?
The USDA minimum is 0.8g per kg of body weight, but for active people, research supports 1.6–2.2g/kg for muscle building and 1.6g/kg when losing fat to prevent muscle loss. Sedentary individuals doing no resistance training can get by on less, but most people benefit from aiming above the minimum.
How much protein is needed to build muscle?
Studies show 1.6–2.2g of protein per kg of body weight per day optimizes muscle protein synthesis. Spread it across 3–4 meals of 30–50g each for best absorption. Total daily intake matters more than timing, but consistency across meals helps the body use protein more efficiently than eating it all at once.
Does the timing of protein intake matter?
Spreading protein evenly across meals (every 3–5 hours) produces better results than eating the same total in one or two sittings. A post-workout meal or shake within 2 hours of training is especially effective for muscle repair and growth, though the overall daily total is the most important variable.