It is estimated that over 25 million people in the United States are affected by this condition. However, it is not osteoporosis, or thinning of the bones
, that is the problem
, but the risk of fracture, especially in the elderly. In the US, some 40% of women and 13% of men may sustain a fracture after age 50. More than 1.3 million fractures annually are attributed to osteoporosis. Among them are some 500,000 vertebral or spine fractures, 250,000 hip fractures, and 240,000 wrist fractures.