Swanson R-Fraction Alpha Lipoic Acid - Double Strength 100 mg 60 Caps 4 Pack

For a more effective alpha lipoic acid supplement, try Swanson R-Fraction Alpha Lipoic Acid. Conventional alpha lipoic acid supplements feature a 50-50 racemic blend of R and S isomers, but the R isomer is the only form that occurs in the human body, and it's the form responsible for most of alpha lipoic acid's beneficial effects. However, efforts to make an effective supplement containing only the R form have always been hampered by stability problems - until now.