This book is a must read on the effects of the neurotoxins aspartame and glutamate (ingredient in monosodium glutamate).

Excitotoxins: The Taste That Kills
by Russel L. Blaylock, M.D

About the Book/Guide

Russel Blaylock exposes many dangers of both artifical sweetners such as aspartame (ie., nutrasweet, equal, etc) and MSG as well as other neurotoxins which he links to Alzheimers, Parkinsons, ALS and other degenerative brain diseases.