Glucosamine Sulphate, Glucosamine Chondroitin
The Amount of Glucosamine Produced by the Body May be Insufficient. Glucosamine is an amino sugar normally formed in humans from glucose. Glucosamine Sulphate is one of the biological chemicals that forms all the major cushioning ingredients of the joint fluids and surrounding tissues. It helps make the fluid thick and elastic.
Sulphate Helps maintain healthy cartilage, ligaments and tendons
Methods We did a randomised, double-blind placebo controlled trial, in which 212 patients with knee osteoarthritis were randomly assigned 1500 mg sulphate oral glucosamine or placebo once daily for 3 years. Weightbearing, anteroposterior radiographs of each knee in full extension were taken at enrolment and after 1 and 3 years. Mean joint-space width of the medial compartment of the tibiofemoral joint was assessed by digital image analysis, whereas minimum joint-space width--ie, at the narrowest point--was measured by visual inspection with a magnifying lens. Symptoms were scored by the Western Ontario and McMaster Universities (WOMAC) osteoarthritis index.
Findings The 106 patients on placebo had a progressive joint-space narrowing, with a mean joint-space loss after 3 years of -0·31 mm (95% CI -0·48 to -0·13). There was no significant joint-space loss in the 106 patients on glucosamine sulphate: -0·06 mm (-0·22 to 0·09). Similar results were reported with minimum joint-space narrowing. As assessed by WOMAC scores, symptoms worsened slightly in patients on placebo compared with the improvement observed after treatment with glucosamine sulphate. There were no differences in safety or reasons for early withdrawal between the treatment and placebo groups.