re: You should take vitamin D.

The common cold virus is very innocuous and fairly. It's just the symptoms of a human body's response to the virus to make a person feel miserable. Typically, the healthier you are and the stronger your immune system the "sicker" you are. So if you are one of those people who never catch a cold...


Also you should refrain from high doses of vitamins. Not because of side effects from the dose, but because commercially sold vitamins aren't regulated or are regulated laxly by the FDA. Most vitamins that you purchase of store shelves or from "Nutritional Health Centers" have low quality control standards and in some cases do not even contain the vitamins advertised.