I've posted before about Blaylock's book "Exitotoxins" and it's all about msg, aspartame, etc. He cites substantial research support, including at least one study that I can remember by cw olanow, most here know that name. If you haven't read it, you should (it'll take a awhile, but worth it). And more importantly, radically change your diet to as simple and close to the earth as possible. I have now read several places that homeopaths recommend PDers eat at least a 75% raw foods diet. Now THAT'S a lot of broccoli and bananas!