They may be generating statistically significant sales, but little evidence exists to show that glucosamine or chondroitin sulfate relieve chronic joint pain.
"The field is rich in anecdotal reports and poor studies about the effectiveness of these therapies," Robert D'Ambrosia, MD, first vice president of the American Academy of Orthopaedic Surgeons, warned during the academy's annual writers conference, held last month in New York City. "The most impressive fact about these therapies is the enormous amount of money consumers are spending on unproven treatments."
Voelker R. Pain Relief Warning. JAMA. 1998;280(20):1735. doi:10.1001/jama.280.20.1735-JQU80008-3-1