Osteoporosis is a disease of excessive demineralization of bone, which on average starts to take place in both sexes after age 35. While men are less affected, the decrease in the bone density of postmenopausal women is a much more serious problem. However by age 75, the gap closes where both genders become equally prone for bone loss. For instance, after sustaining a hip fracture, it is estimated that 20% of patients die within one year, 50% cannot walk any longer without assistance, while 25% require institutionalization in long-term nursing care facilities... Full Text