Alpha-lipoic acid (ALA) is naturally produced in the human body in very small amounts, but is also available in some foods. ALA is unique in that it can function in both aqueous (water) and lipid (fat) environments, which allows it to easily cross biological membranes to exert its actions.* ALA is known to recycle vitamins C and E and some other free radical quenchers, extending their activities.* ALA also supports glutathione production, participates in healthy glucose metabolism, helps to support healthy neural tissues, and promotes healthy vascular function.*