Vitamin D helps the body use calcium and phosphorus to make strong bones and teeth. It is obtained primarily through exposure of the skin to sunlight, but it can also be obtained from some foods and dietary supplements. Many studies in humans, but not all, suggest that higher intakes of vitamin D or higher levels of vitamin D in the blood are associated with a reduced risk of colorectal cancer. Whether vitamin D is associated with reduced risks of other cancers, including breast, prostate, and pancreatic cancers, remains unclear.
Natural Health News Breast cancer patients with high levels of vitamin D in their blood are twice as likely to survive the disease as women with low levels of this nutrient, according to a recent study.
In previous studies, the researchers from the University of California, San Diego have shown that low vitamin D levels were linked to a higher risk of premenopausal breast cancer.
That finding, says lead researcher Cedric F. Garland, DrPH, professor in the Department of Family and Preventive Medicine, prompted him to question the relationship between 25-hydroxyvitamin D a metabolite produced by the body from the ingestion of vitamin D and breast cancer survival rates.
Garland and his colleagues performed a statistical analysis of five studies of 25-hydroxyvitamin D obtained at the time of patient diagnosis and their follow-up for an average of nine years. Combined, the studies included 4,443 breast cancer …
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