Study on Glucosamine: No Cure for Knee Pain

A regular  glucosamine liquid supplement won't prevent deterioration of knee cartilage, cut down on bone bruises or lessen knee pain, say the authors  of a recent study. 

Glucosamine is an amino sugar and a prominent precursor in the biochemical synthesis of glycosylated proteins and lipids. Glucosamine is part of the structure of the polysaccharides chitosan and chitin, which compose the exoskeletons of crustaceans and other arthropods, as well as the cell walls of fungi and many higher organisms

The study found no evidence that drinking glucosamine supplement reduced knee cartilage damage, relieved pain or improved function in people who complained of chronic knee pain, acording to Dr. C. Kent Kwoh, professor of medicine and medical imaging at the University of Arizona College of Medicine.

http://onlinelibrary.wiley.com/doi/10.1002/art.38314/abstract