Hyaluronic acid is a glycosaminoglycan compound, an alternating chain of the monosaccharide glucosamine (in dexter confirmation, like all amino sugars in the body) and alderonic acid, present in all glycosamines. It is used in synovial fluid, a joint lubricator, and cartilage. An absence of hyaluronic acid in the body can cause significant joint problems.

Excalibre kindly informed me of an additional use for hyaluronic acid. It's apparently a trendy ingredient for those oh-so-multitudinous moisturizers saturating the market. Yet another wonder chemical? Not really. It does little beyond basic moisturization.

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