, highest quality grade at a very competitive price, a potent antioxidant, diabetics please read the cautions section, fantastic value for moneyalpha-lipoic acid was discovered over 40 years ago & was originally thought of as a vitamin; however when researchers found that our bodies could synthesize it the status of ‘vitamin’ was lost. however a dietary source of alpha-lipoic acid is still important & it is found in almost all foods especially in kidney liver spinach & broccoli.for a while it was the subject of rave reviews in some newspapers along with acetyl-l-carnitine as it was billed as an 'elixir of life'. we don't think it's that but we do think it is a powerful antioxidant that the body uses to mop up excess free radicals the reactive chemicals that can damage our cells.alpha-lipoic acid has been the focus of a great deal of research much of which is fascinating & far too detailed to describe here. an online search is therefore highly recommended.