Thioctic Acid Best Antioxidant Anti-Ageing Thioctic Acid at a glance AKA alpha lipoic acid An enzyme that offers antioxidant properties Both water-soluble and oil-soluble Can help defend skin from damage Thioctic Acid description Thioctic acid is the technical name for the antioxidant alpha lipoic acid. Unlike many antioxidants that are either water-soluble or oil-soluble, thioctic acid is both. Despite claims to the contrary, alpha lipoic acid isn’t the best antioxidant around. It is one of many that are beneficial for skin. Related ingredients: Alpha Lipoic Acid