title: Involutional osteoporosis.
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging; D001862:Bone Resorption / Q000187:drug effects; D001842:Bone and Bones / Q000033:anatomy & histology; D002116:Calcitonin / Q000502:physiology / Q000627:therapeutic use; D002118:Calcium / Q000378:metabolism / Q000627:therapeutic use; D003720:Densitometry; D004967:Estrogens / Q000627:therapeutic use; D005260:Female; D050723:Fractures, Bone / Q000209:etiology; D006801:Humans; D008297:Male; D008593:Menopause; D008875:Middle Aged; D008954:Models, Biological; D009747:Nutritional Physiological Phenomena; D010012:Osteogenesis / Q000187:drug effects; D010024:Osteoporosis / Q000209:etiology* / Q000503:physiopathology; D010281:Parathyroid Hormone / Q000502:physiology; D010710:Phosphates / Q000627:therapeutic use; D005082:Physical Exertion
chemical_list: D004967:Estrogens; D010281:Parathyroid Hormone; D010710:Phosphates; D002116:Calcitonin; D002118:Calcium