The hard facts on bones and vitamin D

The best way to reduce risk for osteoporosis — a thinning and weakening of the bones — seems to be the subject of ongoing debate. This month brought a fresh round of questions after a report published in the New England Journal of Medicine suggested that vitamin D is the key ingredient to preventing and reducing broken bones. Dr. Sonali Khandelwal, a rheumatologist and co-director of the Osteoporosis Center at Chicago's Rush University Medical Center, gave us some answers.

By Bonnie Miller Rubin, Chicago Tribune reporter

August 1, 2012