Have you been diagnosed with osteopenia?

If so, you may very well be taking drugs to head off what you believe is the inexorable slide into osteoporosis. Maybe you’re on Boniva, or Fosamax, or Actonel to keep that T-score from dropping.

After all, by preventing further bone loss, you’re protecting yourself from a broken hip and painful spinal fractures, right?

Well, maybe. But a study published last year concludes that statistically speaking, 270 women diagnosed with osteopenia, would need...