The RDA of 0.36 g/lb (0.8 g/kg) prevents deficiency but is far below optimal for anyone who exercises, is trying to lose weight, or is over 50. Research consistently shows higher intakes improve body composition, recovery, and satiety.
Step 1: Know the Recommendations
| Goal | Protein (g/lb) | Protein (g/kg) | Example (170 lb) |
|---|---|---|---|
| RDA Minimum | 0.36 | 0.8 | 61g |
| General Fitness | 0.5-0.7 | 1.1-1.5 | 85-119g |
| Muscle Building | 0.7-1.0 | 1.6-2.2 | 119-170g |
| Weight Loss (preserving muscle) | 0.8-1.2 | 1.8-2.6 | 136-204g |
Step 2: Distribute Across Meals
Muscle protein synthesis (MPS) maxes out at about 25-40g per meal. Spreading protein evenly across 3-4 meals optimizes MPS compared to loading it all at dinner. For 150g daily: aim for ~38g across 4 meals.
Step 3: Prioritize Leucine
Leucine is the amino acid that triggers MPS. Aim for 2.5-3g leucine per meal. High-leucine foods: whey protein (3.5g per 30g serving), eggs (0.6g each), chicken breast (2.5g per 4 oz), Greek yogurt (1.5g per cup). Plan your protein with the Protein Calculator.
Calculate your exact protein needs with 55-food database
Try the Protein Calculator →Key Takeaways
- The RDA (0.36 g/lb) is a minimum, not an optimal target for active people.
- Most active people need 0.7-1.0 g/lb for muscle building and recovery.
- Spread protein across 3-4 meals at 25-40g each for maximum muscle protein synthesis.
- Higher protein during weight loss (0.8-1.2 g/lb) preserves muscle mass.