Osteoporosis is a disease where bones become brittle and weak, increasing the risk of fractures from minor injuries. It is common in older women, with a 50 year old woman having a 40% chance of an osteoporotic fracture in her lifetime. While osteoporosis has no symptoms, it can be prevented and treated if detected early through lifestyle changes like adequate calcium, vitamin D, exercise and avoiding smoking. Treatment may also include medications to prevent fractures and preserve bone density.