
thumb|Osteopenia exists on a spectrum of normal to dangerously low bone density (osteoporosis).
via Wikipedia infobox
thumb|Osteopenia exists on a spectrum of normal to dangerously low bone density (osteoporosis).
Osteopenia, also called low bone mass or low bone density, is a condition in which bone density is low. Because their bones are weaker, people with osteopenia may have a higher risk of fractures, and some people may go on to develop the more serious condition of osteoporosis. In 2010, 43 million older adults in the US had osteopenia. Unlike osteoporosis, osteopenia usually does not cause noticeable symptoms because losing bone density itself does not cause pain.
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