Optimal Protein Intake for Aging and Muscle Preservation

The Problem

The standard protein recommendation fails to prevent sarcopenia, leaving older adults vulnerable to frailty, falls, and metabolic decline.

The Claim

Key Evidence

• •Multiple studies show that protein intakes above the RDA improve lean body mass and physical performance in older adults.
• •Research by Stuart Phillips and others consistently demonstrates that older individuals need more protein per meal to achieve equivalent muscle protein synthesis rates as younger people.

Practical Implication

Dietary guidelines should be updated to reflect age-specific protein recommendations, and clinical practice should emphasize protein intake as a cornerstone of healthy aging.

Nuance & Limits

Total daily protein matters, but per-meal dose and amino acid composition (especially leucine) are important. Some populations may need even higher intakes during periods of illness or inactivity (catabolic crises).