The point...hedging my bets. I don't know whether I've got Parkisons...not will I until its too late.
So as long as its backed by something resembling science I'm OK with integrating minor changes into my life on the off chance that it might work. e.g. Right now I'm throwing a decent dose of tummeric into most of my cooking. Tastes fine, costs near zero and might help somewhere along the line. Worse case scenario is that nothing happens and I'm 0.1 USD poorer per month. Hell I suspect I'll receive more positive benefit from believing I might gain a benefit...some difference really.