Alzheimer's Study

This article talks about two studies that showed exercise and vitamin D play a big role in risk reduction for Alzheimer's disease. Its funny to me that they say that "its unclear if supplements will help" maybe they didn't study that or maybe they just don't want to promote something they can't make tons of money on like they can with a drug. But if you have a deficiency (and increased risk) and supplementation eliminates the deficiency (and hence the risk) then it seems like common sense that supplementation would help. But they probably need to do a multi-billion dollar study to show that, and even then the drug companies would still try to bury the story somehow. :)