Active Lipoic Acid is a combination of R-Lipoic and alpha-Lipoic acids. R-Lipoic acid is an active isomer of lipoic acid added for increased activity. This formula is "Sustained Release" to control delivery for several hours. d-Biotin is added to maintain the activity of the lipoic acid.

Other Ingredients: Calcium sulfate, cellulose, hydroxypropyl methycellulose, magnesium trisilicate, magnesium stearate, stearic acid, cellulose & glycerin coating, silica.