title: Involutional osteoporosis.
mesh_terms: D000368:Aged; D001842:Bone and Bones / Q000032:analysis; D002117:Calcitriol / Q000378:metabolism; D002118:Calcium / Q000378:metabolism; D005260:Female; D050723:Fractures, Bone / Q000517:prevention & control; D006801:Humans; D008903:Minerals / Q000032:analysis; D010024:Osteoporosis / Q000175:diagnosis*
chemical_list: D008903:Minerals; D002117:Calcitriol; D002118:Calcium