LYCOS RETRIEVER 
Glucosamine: Glucosamine Hydrochloride
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Glucosamine is available in oral supplements as glucosamine sulfate, glucosamine hydrochloride, and n-acetyl glucosamine. These products may come in tablet, capsule, and powder forms. Glucosamine ... is found in combination products, usually with chondroitin. Minerals and vitamins may also be included in these combinations, such as manganese.
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Glucosamine is available in pharmacies and health food stores as the sulfate, hydrochloride, n-acetyl or chlorhydrate salt and as the destrorotatory isomer. It is sometimes combined with chondroitin sulfate, a glycosaminoglycan that has been reported to maintain viscosity in joints, stimulate cartilage repair mechanisms and inhibit enzymes that break down cartilage [7].
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Schiff® uses Glucosamine Hydrochloride (HCl), which has the highest potency of active Glucosamine among Glucosamine forms. Glucosamine Hydrochloride is about 83% Glucosamine, while most brands use Glucosamine Sulfate that is only about 65% Glucosamine.
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Glucosamine Hydrochloride