Protein Amount, Quality and Timing - with Dr. Donald Layman | The Proof Podcast EP 236

Skeletal muscle serves as a foundational component of metabolic health, regulating glucose and lipid metabolism while preventing age-related frailty. Maintaining muscle function requires a shift from the minimum RDA toward an optimal intake of 1.2–1.6 grams of protein per kilogram of body weight, particularly as metabolic efficiency declines with age. Leucine acts as the primary trigger for muscle protein synthesis, necessitating approximately 2.5 grams per meal to effectively activate mTOR. While resistance training remains the most critical stimulus for hypertrophy and strength, protein distribution—specifically prioritizing a high-protein first meal—helps mitigate the catabolic state induced by overnight fasting. Contrary to concerns regarding longevity and kidney health, high-quality protein intake supports metabolic vitality, provided that overall caloric control and diet quality remain the primary focus over restrictive, longevity-focused dietary patterns.