Susan, I have been on a low fat vegetarian diet since the fall and it has made a major impact on my PD ( particularily the rigidity). In my opinion there is a difference between the way my body uses animal protein and vegetable protein. The vegetable protein does not seem to affect me as a matter of fact legumes seem to give me a lift. This is of course just my opinion but you may want to give it a try. The book that started me on this oddesy is DR DEAN ORNISH'S PROGRAM FOR REVERSING HEART DISEASE(there are some recipes). As far as low protein before I really did this right I went vegetarian but did not eat legumes which are a source of protein and I got very slow and tired so be careful. Donna