Elderly people are prone to osteoporosis because, as they age, the minerals in their bones (especially calcium) gradually deplete. Additionally, hormone levels in their bodies change, particularly in women after menopause, when estrogen levels drop, accelerating bone loss. Older adults also tend to be less active, leading to decreased muscle strength and bone density, all of which increase the risk of osteoporosis. Therefore, supplementing with calcium and vitamin D, maintaining regular exercise, and leading a healthy lifestyle are essential for preventing osteoporosis.