Glucosamine and chondroitin fare poorly in pain study, but sales are strong

In 2006, the New England Journal of Medicine published a $12.5 million study saying that, for most people, glucosamine and chondroitin do not soothe knee pain much better than a placebo.

Try telling that to patients who swear that the supplements have helped their aching knees or backs — a position that the study's lead researcher, Daniel Clegg of the University of Utah School of Medicine, finds himself in often. Read the rest of this article