Sarcopenia
Protein intake and physical activity are important stimuli for muscle protein synthesis. A number of expert groups have proposed an increase in dietary protein recommendations for older age groups to 1.0-1.2 g/kg body weight per day.
Key nutrient supplementation in older adults is of interest in the prevention of sarcopenia and frailty, since it is a simple, low-cost treatment approach without major side effects.
High-protein diet
While elevated amounts of protein consumption are beneficial during athletic training, particularly when attempting to gain muscular mass and strength, there is little evidence of any benefit from increasing protein intake above an intake level of 2g/kg bodyweight/day.