Water and oil-soluble for maximum effect in all tissues. Works synergistically with antioxidant vitamins at a cellular level. Distinctive free-radical scavenging properties Recent studies show Alpha Lipoic Acid sustains energy production. Per 1 Capsule: Alpha Lipoic Acid 250 mg. Other Ingredients: Gelatin Capsule, Rice Flour, Silica and Magnesium Stearate.