Natrol7#174; Alpha Lipoic Acid 600mg Dietary Supplement Capsules. Alpha Lipoic Acid. 600mg. Whole body cell rejuvenation. Helps protect against age-related damage. Dietary supplement. No yeast, wheat, corn, milk, egg, soy, gluten, artificial colors or flavors, added sugar, starch or preservatives. Natrol® Alpha Lipoic Acid (ALA) is a powerful antioxidant that helps protect your cells from oxidative damage related to aging and environmental stress. ALA supplementation can support your energy metabolism and help rejuvenate your cells. ALA can also encourage glucose uptake by the body's cells.