Many people are deficient in vitamin D. The easiest and most reliable way of getting the appropriate amount is from food and a daily supplement.

Many people are deficient in vitamin D.

A preponderance of evidence, from the best observational studies the medical world has to offer, gathered over 25 years, has led to the conclusion that public health action is needed.

Primary prevention of these cancers has largely been neglected, but we now have proof that the incidence of colon, breast, and ovarian cancer can be reduced dramatically by increasing the public's intake of vitamin D.

The higher the level of vitamin D, the lower the risk of breast cancer.

There's nothing else you can take that has this ability to prevent cancer.