title: Osteoporosis and aging: gastrointestinal aspects.
mesh_terms: D000375:Aging; D001842:Bone and Bones / Q000503:physiopathology; D002118:Calcium / Q000008:administration & dosage / Q000378:metabolism; D004032:Diet; D004064:Digestive System / Q000503:physiopathology*; D005767:Gastrointestinal Diseases / Q000150:complications; D006801:Humans; D007408:Intestinal Absorption; D010024:Osteoporosis / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology*
chemical_list: D002118:Calcium