Thank you for your question and for visiting our forum.
I attended a conference this week on Vitamin D. Researchers are saying it is important to take it to help build our immunity and fend off a host of diseases. In my opinion, boosting your immunity and prevention go hand in hand. Meaning, by boosting your immune system you can help prevent certain dis-eases such as the flu or common cold. Obviously there are many factors at play when it comes to Vitamin D and immunity, so I would recommend reading some well informed articles on the subject so you can make your own informed choices. Here are a few I think are great:
Vitamin D Toxicity Myth
www.naturallysavvy.com/dr-zoltan-rona-md...amin-d-toxicity-myth
Vitamin D: What You Need to Know on the Huffington Post by Dr. Frank Lipman:
www.huffingtonpost.com/dr-frank-lipman/v...need-t_b_308973.html
I hope that answers your questions!