Yes, it is pricey indeed. But if it's as useful as touted, then it would be well worth it - the edit link above seemed to be the cheapest, at least as far as I could tell. I mean, it is, but it may not work for some for whatever reason, and it does appear to taste like crap.

Well, the links I provided will provide some useful information and studies, but there are a lot of other things on the web. There's also this: http://www.huffingtonpost.com/dr-mar..._b_530494.html, and I think this is the article in video form: https://www.youtube.com/watch?v=Eh2PYQBICWs. As you'll see it takes on an executive role in the body, it seems, which involved lots of other important substances, including R-lipoic. I imagine it is immensely useful for those who have PN from immune problems and who are suffering from oxidative stress. Many, if not all, of us are suffering from poorly functioning bodies and it seems glutathione is the most important factor in getting things right.