>Levo-dihydoxy-phenylalanine (L-dopa), the amino acid precursor >of dopamine, was first used to treat Parkinson's disease >(brain catecholamine neurochemistry). I do not believe so! Show me the reference(s)! >Phenylalanine, I think, is better known as Nutra Sweet. Again, incorrect! Nutra sweet hydrolyzes (breaks down) into two different amino acids, one of which is phenylalanine. >Has there ever been a discussion about this artificial sweetener in PD diet--good or bad? You might be able to retrieve much discussion on this from the archives, but do not believe the alarmists without authoritative evidence. Michel Margosis