Key points from article :
Possible cause of sarcopenia impaired processing of the essential amino acid leucine.
Study suggests effect of reduced protein intake is small compared to other factors.
Protein intake over RDA had no significant effect on body mass, muscle or function.
Few rigorous studies have evaluated whether higher protein intake among older adults.
OPTIMen was a randomized, placebo-controlled, double-blind, parallel group trial.
Seventy-eight participants completed the six-month trial.
The study was published in the JAMA Internal Medicine journal.
