As youngsters our bones are the last thing we think about. We only start taking notice of them when we get older and medical professionals talk to us about loss of bone density. Men do suffer from bone loss as they get older because of lower testosterone levels or as a side effect of medications such as thyroid hormone, corticosteroids or chemotherapy. However it is women who are at the greatest risk because they have less bone tissue than men do and because of dropping estrogen levels at menopause. The importance of bone loss lies in the fact that it greatly increases the risk of fracture, notably forearm, hip and vertebral fracture. After the age of 50 the risk of sustaining one of these fractures is 40% in women and 15% in men.