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Glucosamine

Glucosamine (C₆H₁₄NO₅) is a dietary supplement distributed as a salt — usually as glucosamine HCl, glucosamine sulfate potassium, or glucosamine sulfate sodium. A typical dosage is 1,500 mg per day. The salt complexes, glucosamine sulfate _* KCl or glucosamine sulfate _* NaCl, or the hydrochloride, glucosamine sulfate _* HCl, are required for stabiliity. more...

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Glucosamine sulfate is a synthetic version of a compound the human body makes to stimulate the growth of cartilage. The idea is that such compounds help rebuild cartilage and reduce the symptoms of arthritis.

The supplement is an acceptable treatment in veterinary medicine, but the Arthritis Foundation and the American College of Rheumatology have not yet officially recommended it for humans, despite a large body of evidence supporting its use and the fact that it is considered a drug in several countries around the world. The United States Food and Drug Administration does not approve any dietary supplement, and, as such, at this time glucosamine is sold as a nutritional supplement and therefore does not need evidence of safety and efficacy. Glucosamine has been studied for over 20 years. As a natural substance that is already present inside the body, evidence bears out that glucosamine appears to be quite safe. One caveat - there is limited evidence that individuals with an allergy to shellfish should avoid glucosamine, as it is is usually derived from shellfish. There are vegetarian sources available.

Current research shows it may play a role in relieving pain associated with osteoarthritis. As used, it is often paired with MSM. The National Institutes of Health conducted a multi-arm, placebo-controlled study to see the effects of chondroitin and glucosamine on osteoporosis and osteoarthritis. Recent results of a 6-month clinical trial indicate that chondroitin sulfate (1.2 g) plus glucosamine (1.5 g) daily were as effective in relieving osteoarthritic knee pain as Celebrex, but more study would be helpful.

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The effect of glucosamine-chondroitin supplementation on glycosylated hemoglobin levels in patients with type 2 diabetes mellitus: a placebo-controlled,
From Alternative Medicine Review, 11/1/03 by DA Scroggie

BACKGROUND: With increasing use of glucosamine-containing supplements for the treatment of osteoarthritis, there is increasing concern in the medical community about possible toxic effects. The present study was undertaken to determine whether glucosamine supplementation altered hemoglobin Ale concentrations in patients with well-controlled diabetes mellitus. OBJECTIVE: To evaluate possible effects of glucosamine supplementation on glycemic control in a selected population of patients with type 2 diabetes mellitus. DESIGN: Placebo-controlled, double-blinded, randomized clinical trial. SETTING: Outpatient, diabetes monitoring clinic. PATIENTS: Patients were typically elderly patients, evenly divided between men and women. Most of the patients were being treated with 1 or 2 drugs for glycemic control. INTERVENTION: In daily doses for 90 days, patients received either placebo or a combination of 1500 mg of glucosamine hydrochloride with 1200 mg of chondroitin sulfate (Cosamin DS: Nutramax Laboratories Inc, Edgewood, Md). Main Outcome Measure Hemoglobin A1c levels before and after 90 days of therapy. RESULTS: There were 4 withdrawals from the glucosamine-treated group. Three were related to comorbidities (myocardial infarction, congestive heart failure, and atrial fibrillation) and 1 to a possible adverse reaction (excessive flares). No other patient reported any adverse effects of glucosamine therapy, and no patient had any change in their diabetes management. Mean hemoglobin A1c concentrations were not significantly different between groups prior to glucosamine therapy. Posttreatment hemoglobin A1c concentrations were not significantly different between groups, nor were there any significant differences within groups before and after treatment. CONCLUSION: This study demonstrates that oral glucosamine supplementation does not result in clinically significant alterations in glucose metabolism in patients with type 2 diabetes mellitus.

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