Dietary supplement. Source Naturals R-Lipoic Acid is a natural form of the lipoic acid that your body can synthesize and safely metabolize. It may be better absorbed and more effective as an antioxidant than alpha-lipoic acid. R-lipoic acid by itself may be 10 times more effective than other forms of lipoic acid and has been called the mitochondrial antioxidant because it is a key component of mitochondrial dehydrogenase complexes, which may help to slow the natural aging process in animals. Also, animal research has shown that R-lipoic acid can increase or maintain levels of other antioxidants including CoQ10, Vitamin C, Vitamin E and glutathione, which may decline with age, more efficiently than other forms of lipoic acid (These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease). Suitable for vegetarians. Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, salt, preservatives, or artificial color, flavor or fragrance.