Vitamin D deficiency may account for several thousand premature deaths from colon, breast, ovarian and other cancers every year, according to the findings of Dr. Cedric Garland, recently published in the American Journal of Public Health.
Dr. Garland lead a research team that reviewed 63 studies on the relationship between blood levels of vitamin D and certain types of cancer worldwide between 1966 and 2004. The review concluded that taking 1,000 international units (IU) of vitamin D per day could lower one's cancer risk by as much as 50%. Garland believes the protective link between increasing vitamin D levels and decreasing certain cancer risk is just as clear as the harmful link between smoking and lung cancer.
According to an article published by Reader's Digest (September, 2006), researchers have now identified at least 18 types of cancer that are more common among people who don't get enough Vitamin D, including such common ones as breast, lung and prostate. Other cancers that have been linked to Vitamin D are bladder, esophageal, gastric, ovarian, rectal, renal, uterine, non-Hodgkin's lymphoma, cervical, gallbladder, laryngeal, oral, pancreatic, Hodgkin's lymphoma and colon. They've learned that prostate cancer typically strikes men who work indoors four years earlier than it occurs among men who work outdoors. Breast cancer tends to be more aggressive and more frequently fatal among African American women than it is among white women because black skin doesn't efficiently absorb the ultraviolet B (UVB) rays that trigger Vitamin D production.
Even after cancer strikes, the Vitamin D our bodies make in the summer helps fight the disease. A study at Harvard found that mortality rates were 40 percent higher among lung cancer patients operated on in the winter than among those who had surgery in the summer and had high levels of Vitamin D from the sun or their diet. Benefits aren't limited to Vitamin D from the sun. In Canada, patients given Vitamin D along with chemotherapy had fewer side effects and developed fewer thromboses (blood clots), serious complications of treatment, than those who got a placebo with chemo.
In the lab, researchers have watched as activated Vitamin D actually turns off cancer. When prostate cancer cells were exposed to Vitamin D, the cells stopped producing wildly and resumed normal, orderly growth. Later studies showed that the same process occurs in colon and breast cancer cells. And when Dr. Holick's team gave Vitamin D to mice with colon cancer, they witnessed a 40 percent reduction in tumor growth.
When researchers gave daily supplements of 1,000 IUs of Vitamin D for six months to women with multiple sclerosis, they saw an increase in body chemicals that put the brakes on the immune system attacks that worsen the disease.
The RDA for Vitamin D will be re-examined starting in 2008 and may be increased to 1,000 IU per day (or higher) for everyone over age one.
Vitamin D is a key nutrient in many major biological functions. Vitamin D maintains normal blood levels of calcium and phosphorus; promotes calcium absorption; and helps to form strong bones. Vitamin D deficiency has also been associated with decreased muscle strength and an increase in the likelihood of falls. Research also suggests that vitamin D may help maintain a healthy immune system and help regulate cell growth and differentiation, potentially even playing a role in helping people with Seasonal Affective Disorder (SAD).
Surprisingly, according to the Institute of Medicine, many people are not consuming sufficient amounts of vitamin D -- and may not even be aware of the deficiency. Vitamin D deficiency is more common in certain population groups:
Considering the many benefits of this vital nutrient, shouldn't you add more vitamin D to your healthcare regimen today?

***As set down by the Food and Drug Administration, vitamin supplement products cannot be advertised as intended to diagnose, treat, cure or prevent any disease.***


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