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Alpha lipoic acid (also known as ALA or thioctic acid) is a sulfur-containing organic acid powerful antioxidant, and an essential component of aerobic metabolism.
Alpha lipoic acid exists in two stereoisomers, the biologically active R-ALA, in addition to S-ALA, which is not produced in the human body. R-alpha lipoic acid is produced synthetically, and chemical manufacturing processes yield both the R- and S- isomers. The pure R- form is more costly to refine, as a result.
Supplementation of R-alpha lipoic acid may help support a healthy metabolism.
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