Suitable for vegetarians. Source Naturals R-Lipoic Acid is a natural form of 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.
"I've been taking Source Naturals R-Lipoic Acid now for 6 months. I haven't suffered any negative side effects. I don't know how effective it is, but as long as I am to be on it I will continue taking this brand."