Eat · Brain health technique
Protein
Evidence grade: Essential
Provides amino acids essential for neurotransmitter synthesis, repair, and muscle maintenance. Found in meat, fish, dairy, eggs, legumes, soy, and nuts. Both total amount and even distribution throughout the day influence brain and metabolic outcomes.
- Practice
- Eat
- Principle
- Nourishment
- Tactic
- Brain Healthy Foods
- Health domains
- metabolic, musculoskeletal
- Evidence grade
- Essential
- Strength of evidence
- High
- Cost
- High
- Effort
- Low
- Time commitment
- Low
How to practice Protein
Most people should aim for at least 0.7 grams of protein per pound of body weight daily (e.g., ~110 g for a 160-lb adult), and maybe more if you are training intensely; some experts recommend up to 1 g/lb for strength and longevity goals since adherence is difficult and a higher target offers some buffer for mistakes. Spread intake evenly, about 25–35 g per meal, to maximize absorption and muscle protein synthesis. Ensure you obtain a complete amino acid profile, especially leucine to trigger muscle hypertrophy; this is found most abundantly in sources like whey protein and animal meats. Prioritize fish, eggs, poultry, dairy, beans, and tofu. Extremely high protein diets (>1.2 g/lb) rarely add benefit and may be costly or hard to sustain.
The evidence behind Protein
Amino acids like tryptophan and tyrosine are precursors for serotonin and dopamine. Inadequate protein impairs neurotransmission and recovery, while adequate intake supports cognitive resilience, muscle mass, and metabolic stability. A growing body of evidence, including metabolic studies and expert consensus, suggests the current RDA (0.36 g/lb) is too low for optimal health. Many researchers recommend at least 0.7g per lb of body weight, especially for older adults and active individuals. Excessive intake offers diminishing returns but is generally safe for healthy kidneys.
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