Vitamin C helps keep Glutathione in the reduced/premium form and is effective at increasing intracellular Glutathione levels. Vitamin C may further help brighten the skin tone by inhibiting melanin production. On the other hand, Alpha Lipoic Acid has great importance in our cells and is involved in energy production, blood sugar control, brain health and detoxification. In addition to serving as the hub of the body’s antioxidant network, Alpha Lipoic Acid is the only antioxidant that can boost and increase the level of intracellular Glutathione. Supplementing on pure Glutathione alone will not have the powerful effect on your skin as you may have with our products. OPTI GLUTA ADVANCED SKIN BRIGHTENING SUPPLEMENTS are carefully blended with a good combination and dose of skin brightening nutrients that together make the product so effective.