A four-year clinical trial studying more than 1,000 women showed at least a 60 percent reduction in the incidence of cancer in those who took a Vitamin D supplement.
The Canadian Cancer Society has endorsed 1,000 IU per day of Vitamin D as preventive against cancer.
This is an eyebrow-raising recommendation because that is five times the established recommended daily allowance (RDA).
Vitamin D is synthesized in the skin with the help of sunlight. Fifteen minutes of sunlight on the skin three times a week has been suggested as a good amount for effective Vitamin D production. (Please note that sunscreens SPF 8 or higher effectively blocks Vitamin D production.)
The cancer society is rethinking its recommendation to use sunscreens in light of the latest findings.
Compared to skin cancer, most of which are not lethal, more people suffer from cancers of the breast, colon, lung, prostate and lymphoma combined.
Low Vitamin D status has been linked to other diseases such as multiple sclerosis, juvenile diabetes, influenza, psoriasis and osteoporosis.
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