How effective are glucosamine and chondroitin for treating arthritis?

From a conceptual and biochemical standpoint, both glucosamine and chondroitin should be helpful for the symptoms and disease process of arthritis. What is truly impressive is the increasing clinical evidence showing their efficacy in reducing both symptoms and the need for medication. Numerous studies, including long-term, placebo-controlled studies -- the "gold standard" in clinical study design -- and "meta-analyses" that review all of the published data, have demonstrated the effectiveness of glucosamine and chondroitin, earning them a place in the treatment regimen of patients with arthritis.

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