Vitamin D: The super vitamin.

Vitamin D play a more significant role in preventing certain kinds of cancer than previously suspected (David, M.D., 2008). It reduces the risk of developing breast cancer, prostate cancer, colon cancer, diabetes, depression, high blood pressure, arthritis, autoimmune disorders and obesity (Asp, 2008, p.92).

In order to prevent the diseases mentioned above, many health experts suggest a minimum of 2,000 UI per day (through supplements), though current guidelines call for 200 IU daily for adult women in order to gain vitamin D. Furthermore, sun exposure at least 15 to 20 minutes in the mid-day sun every day before applying sunscreen is also best recommended.

References:
* David, James E., M.D. (2008). John Willey and Son. USA.
* Asp, Karen (2008). The Super Vitamin. USA: Natural Health Magazine.