...for loss of minerals or thinning bones. It turned out Ms. Grimm's bones were weaker than normal. She was diagnosed with osteopenia, a precursor to osteoporosis if left untreated. "Osteoporosis never crossed my mind," said Ms. Grimm, 35. "I have...

...recommended daily allowance. If a bone density test and a complete medical workup indicate that you have osteoporosis or osteopenia (some bone loss but not quite osteoporosis), diet and exercise alone may not halt further bone loss. Drug therapies are...