Vitamin D Levels Associated with Parkinson's Disease Risk
http://www.sciencedaily.com/releases...0712162624.htm
Over 65s Should Take High Dose Vitamin D to Prevent Falls, Say Researchers
http://www.sciencedaily.com/releases...1001191659.htm
Rick, I find that when I get one of those shaky "spells" such as you and Laura describe, it's because I haven't been taking my D3. When I'm in that zombie state, the D3 helps within a couple of hours.
Jaye