By far the most common bone disease, osteoporosis - a thinning of the bones with a reduction in bone mass - affects an estimated 10 million people in the U.S. The condition is one of several factors that increase the risk of bone fracture. Related:Some Women Resist Osteoporosis Drugs | Diet and Exercise Are Not Always Enough
GRAPHIC: BY Brenna Maloney and Todd Lindeman The Washington Post - June 11, 2007