GNC Alpha-Lipoic Acid 300mg is an antioxidant that helps protect against cellular damage. It naturally occurs in several foods, including yeast, broccoli, spinach and potatoes. It plays a role in maintaining ideal levels of Vitamin C and E in the body. Converting carbohydrates into energy requires sufficient levels of this compound. As you age, cell energy production declines. ALA is a key factor in the production of energy inside the cell. This alpha-lipoic acid supplement supports antioxidant regeneration. • Helps defend cells against environmental damage • Supports energy production • ALA is a powerful antioxidant and supports the regeneration of other antioxidants in the body.