one of the strongest ala supplements, a potent antioxidant,highest quality grade, at a very competitive price,positive reviews from happy customers ,a key part of the body\'s defence against free radicalsalpha-lipoic acid was discovered over 40 years ago and 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 and it is found in almost all foods, especially in kidney, liver, spinach and 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 and far too detailed to describe here. an online search is therefore highly recommended. this product is excellent value for money compared to many other brands.diabetics, please read the cautions section.