Recent scientific research has suggested taking 1000 I.U. of Vitamin D as a way to prevent a number of different types of cancers. The scientific evidence was compelling enough to prompt a media announcement from the Canadian Cancer Society in support of the research and the recommendation for adults to take 1000 I.U. daily as a preventative measure for cancer.
Vitamin D is also a necessary co-factor in calcium absorption and utilization, and is especially important in the winter months to increase Vitamin D levels due to lack of exposure to the sun. Recent research has also indicated that Vitamin D is useful for heart health, high blood pressure, fibromyalgia, diabetes, multiple sclerosis and rheumatoid arthritis.