Steffi, in that "other" thread that had to be locked...I posted a reply almost immediately about my personal take on what causes PD, but I later deleted my whole reply.

I see stress as a factor in many things in life, but not as a direct cause of anything in particular. It may exacerbate health issues, as it does with PD, but I doubt that it is a direct cause...no matter what I read.

So what is SOD? I may have missed something...so I have to ask. Is this a UK thing?

We can guess and speculate on the cause of PD "until thecow3.gifcow2.gifcome home."

Personally, and in the most simplistic way of explanation, I believe it is rooted in the environment and our individual human predisposition to chemistry change, as well as the way our personal chemistry processes that environmental factor; e.g. toxins.