I started using it a month ago on the advice of a naturopath. I'd never heard of it before. She believes I have a hyperactive thyroid, and it's part of the program to fix that. I went to see her because I've had four years of steadily worsening night time aching, that neither my MDS or my family dr. could do anything about. Already I'm sleeping better, the ache is out of my arms, and less in my legs, and I have a bit more energy. I still need the same medication for PD at the same intervals, so I don't think it's changed anything about my PD. Now that would be a nice side effect!