Why Protein Is the Building Block of Human Tissue
Dietary protein supplies the essential amino acids required for the synthesis of muscle tissue, enzymes, neurotransmitters, cellular receptors, and immune antibodies. While the Recommended Dietary Allowance (RDA) establishes a baseline of 0.8 grams per kilogram to prevent deficiency, optimal performance requires significantly more.
Evidence-Based Daily Protein Targets
- Sedentary Adult (Maintenance): 0.8 to 1.0 g/kg (0.36 to 0.45 g/lb) of body weight.
- Endurance Athletes (Runners, Cyclists): 1.2 to 1.6 g/kg (0.55 to 0.73 g/lb) to repair ongoing muscle breakdown.
- Resistance Training & Muscle Hypertrophy: 1.6 to 2.2 g/kg (0.73 to 1.0 g/lb) to maximize muscle protein synthesis (MPS).
- Caloric Deficit / Fat Loss (Muscle Preservation): 2.0 to 2.4 g/kg (0.9 to 1.1 g/lb) to prevent lean tissue catabolism when calories are restricted.
- Older Adults (Combating Sarcopenia): 1.2 to 1.5 g/kg to overcome age-related anabolic resistance.
Protein Distribution and the Leucine Trigger
Research indicates that consuming 25 to 40 grams of high-quality protein per meal containing at least 2.5 to 3.0 grams of the branched-chain amino acid leucine triggers maximal muscle protein synthesis every 3 to 5 hours.
Calculate your daily gram targets using our Protein Intake Calculator.