Alpha Lipoic acid is an Antioxidant. There are many uses and advantages to Alpha Lipoic Acid or ALA and these have been researched by many well known universities. Also known as thioctic acid. ALA can be broken into 2 isomers, S-LA and R-LA. R-LA absorbs 50% better than S-LA. So don't buy an Alpha Lipoic Acid that doesn't let you know how much of each isomer is used, they could be selling mostly S-LA. Our ALA is 300mg of R-LA and 300mg of S-LA, zero fillers, zero binders and zero artificial ingredients. Simply Nature's Pure ALA is of the highest grade and with that we give a 100% money back guarantee! Thank you for looking into our quality products. Please be aware that purchases are for 1 bottle not 3.