hi..EDITH,, thanks for writing..i have understood your concerns.. the parkinson s disease is a neurodegenerative disease, in which the dopamine containing neurons in the basal ganglia region of the brain gradually degenerate over time.. there are hypothesis about the oxidative stress as a etiology of the disease..so further research proposed the possible role of antioxidant medications in prevention and treatment of parkinsons disease. variety of agents have been identified and many trial have been done, but none have shown any promising results. so there use is still a debate.. our clinical experience also have negative opinion.. for the parkinsons disease in the initial stage when the symptoms are mild, at that time their use can be beneficial for delaying the degeneration but at severe stage they are of no benefit.. if there are documented benefits over other systems of the body then you can give it a try..[most of the studies shows that benefits are unreliable] dont expect that it will help you in your parkinsons.. i hope this information will be helpful to you..best of luck..wish you a good health..