Alpha Lipoic Acid manufactered in Europe is a disulfide molecule (containing two thiol groups). A thiol (or -SH) consists of a sulfur and a hydrogen atom. This unique antioxidant is both lipid and water soluble a potent promoter of glutathione and an important co-factor in energy metabolism. Biotin is an essential cofactor of intracellular carboxylase enymes and is important for energy production and lipid metabolismOther products from HerbsPro