Bhasin S, et al. - This research was initiated in order to analyze if increasing protein intake to 1.3 g/kg/d in older adults with physical function limitations and usual protein intake within the recommended dietary allowance (RDA) improved the lean body mass (LBM), muscle performance, physical function, fatigue, and well-being and augmented LBM response to a muscle anabolic drug. No rise was noted in the LBM, muscle performance, physical function, or well-being measures when protein intake exceeded the RDA. It did not augment anabolic response to testosterone in older men with physical function limitations whose usual protein intakes were within the RDA. Findings displayed that the RDA for protein was adequate for maintaining LBM. Furthermore, protein intake exceeding the RDA did not promote LBM accretion or augment anabolic response to testosterone.