Aspartame (often called Nutrasweet) is a controversial food additive used to sweeten "diet" products artificially. The product has a long history of causing severe health problems. Along with MSG (monosodium glutamate) and MSG-like food additives, aspartame is in a class of compounds known as "excitotoxins". These excitotoxins basically excite brain cells until they die. In other words, each serving of MSG or aspartame has the potential to cause a little bit of brain damage, which becomes cumulative and could eventually lead to Alzheimer's Disease, Parkinson's, or other neurological diseases.