title: Effect of muscle mass decrease on age-related BMR changes.
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging; D001481:Basal Metabolism; D003401:Creatine / Q000652:urine; D006801:Humans; D008297:Male; D008875:Middle Aged; D009132:Muscles / Q000033:anatomy & histology* / Q000378:metabolism; D009929:Organ Size; D010101:Oxygen Consumption
chemical_list: D003401:Creatine