Glucosamine

Glucosamine (C6H13NO5) is an amino sugar and a prominent precursor in the biochemical synthesis of glycosylated proteins and lipids. Glucosamine is part of the structure of two polysaccharides, chitosan and chitin. Glucosamine is one of the most abundant monosaccharides. It is produced commercially by the hydrolysis of shellfish exoskeletons or, less commonly, by fermentation of a grain such as corn or wheat. Glucosamine has various names depending on the country and its intended use. Although a common dietary supplement, there is little clinical evidence that it is effective for relief of arthritis or pain, and is not an approved prescription drug in most countries, although it is listed as a medicinal product in Europe. Worldwide, there are no clinical organizations that recommend use of glucosamine as a treatment for arthritis.