Swanson R-Fraction Alpha Lipoic Acid is a double-strength alpha lipoic acid supplement built around the R isomer only, rather than the 50/50 R/S blend found in conventional alpha lipoic acid capsules. The pitch is biological: the R form is the one that occurs in the human body and is credited with most of the antioxidant and metabolic effects. R-only formulas are harder to stabilize, so this one stands out mainly on form and potency rather than on extras. It suits people already taking alpha lipoic acid who want the R isomer without the S half, and those who compare labels by isomer and strength rather than by capsule count.
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Buyers rate it highly and mostly talk about the R-only form and the stronger dose as the reasons they chose it over ordinary alpha lipoic acid.
Swanson R-Fraction Alpha Lipoic Acid is an alpha lipoic acid supplement. Conventional alpha lipoic acid supplements contain a 50-50 racemic blend of R and S isomers. This product is built around the R form.
The R isomer is the only form that occurs in the human body. It is the form responsible for most of alpha lipoic acid's beneficial effects. Supplements made with only the R form have been hampered by stability problems, which this formulation addresses.
