Could it be simply Vitamin D?

After having a blood test a few years ago, my Vitamin D level was so low, I was advised to take Vitamin D drops daily, which I have been doing ever since. I take them at breakfast so that I wont forget later in the day. I think that anyone suffering chronic illness or disability, might find themselves at home inside most of the time, and thereby not exposed to the natural sunlight where most gain a sufficient amount of Vitamin D. I am sure this is a common problem - being stuck indoors, it may not be possible, or the weather not permitting to be outside. I knew that Vitamin D was important, and had read up on it, but was very surprised to read an article about the properties possibly helping to slow down the progression of Parkinson's, particularly with those cases that appear to be hereditary. Take a look at the article on The Michael J. Fox Foundation site and read for yourself some very interesting findings.