You have asked an interesting question about supplements for treating Parkinson's. The product of magnesium threonate penetrates the blood-brain barrier and is quite an elixir for the brain. Vitamin C is a potent antioxidant and has been reported to help in PD. There are several B vitamins, B1, B2, B6, B9, and B12, and they all have roles in nutritional biochemistry. These B vitamins all have particular roles in keeping the brain healthy. You can search for the term "Complementary & Alternative Medicine." The belief here is to use supplements that can repair and promote good brain health and keep alive the remaining dopaminergic neurons that are needed to produce dopamine. I will stop here because there are a lot of people who are interested in this field of therapy. Carefully spend time doing an internet search linked to Parkinson's, and a wealth of information will be found, But with anything new, this is the time to talk with your Neurologist about such supplements because they should have an opinion about using them to treat Parkinson's. FrankC for the PD@net Team.