Vitamin D, which the body manufactures as V a result of exposure to ultraviolet light in sunshine, has been found to prevent the onset and growth of prostate and other types of cancer, including breast and colon cancer. For years, scientists have known that men who live in more-northern states with less sun exposure have a higher incidence of prostate cancer than those who live in southern states. Scientists are researching how giving prostate cancer patients high-dose intravenous vitamin D may help fight existing cancers.

Self-defense: It is important for men to get regular sun exposure, especially when they're young, but to keep it to a reasonable and safe level (usually 10 to 15 minutes of sunshine daily without using sunscreen) to avoid increased risk for skin cancer.

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