Thanks for pointing that out. Everytime I see some claim that high amounts of some vitamin can prevent something, it seems that the other side of that coin crops up later, and it's a BAD thing.
The thing that people don't realize is that the vitamins we take everyday are really just man-made chemicals. How can chemicals be good for you? We really need to just get our vitamins from food and not from man-made chemicals. At least that is what I believe.