How Much Protein Do You Need to Build Muscle?

The Research-Backed Protein Target

Meta-analyses consistently show that muscle protein synthesis is maximized at roughly 0.7–1.0 grams of protein per pound of body weight (1.6–2.2 g/kg) per day for people engaged in resistance training. Higher intakes (up to 1.5 g/lb) are safe but show diminishing muscle-building returns beyond 1 g/lb.

Practical Protein Targets by Goal

• Beginner lifters: 0.7–0.8 g/lb body weight
• Intermediate/advanced lifters: 0.8–1.0 g/lb
• Cutting phase (in deficit): 1.0–1.2 g/lb — higher protein preserves muscle when eating less
• Older adults (50+): 1.0–1.2 g/lb — higher protein needed to overcome anabolic resistance

Protein Distribution Matters

Muscle protein synthesis is maximally stimulated by roughly 0.4 g/lb per meal (about 30–40g for most people). Spreading protein across 3–5 meals stimulates muscle building more often throughout the day. A pre-sleep protein dose (30–40g casein or cottage cheese) increases overnight muscle protein synthesis.

Best Protein Sources

• Animal sources: Chicken breast (31g/100g), Greek yogurt (10g/100g), eggs (6g/egg), cottage cheese (11g/100g)
• Plant sources: Lentils (9g/100g cooked), tofu (8g/100g), tempeh (19g/100g), edamame (11g/100g)