“We found that vitamin D insufficiency may have a unique association with Parkinson’s, which is intriguing and warrants further investigation,” Evatt says.
I would think that vitamin D insufficiency would be caused by the affects of Parkinson’s itself. If you have Parkinson’s you probably don’t go outside as much for one thing. But if that was true why don’t Alzheimer’s patients demonstrate a similar high level of vitamin D insufficiency?
Overall this study will probably lead to nowhere. The study is small enough that the statistics probably do not mean anything. But it is still worth looking into.