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Study shows Vitamin D reduces cancer risk by 60% – if you take 3 times the FDA’s recommended dose.

Posted Nov 20 2009 10:04pm

Most Americans and others are not taking enough vitamin D, a fact that may put them at significant risk for developing cancer, according to a landmark study conducted by Creighton University School of Medicine.

The four-year, randomized study followed 1,179 healthy, postmenopausal women from rural eastern Nebraska.* Participants taking calcium, as well as a quantity of vitamin D3 nearly three times the U.S. government’s Recommended Daily Amount (RDA) for middle-age adults, showed a dramatic 60 percent or greater reduction in cancer risk than women who did not get the vitamin.

The results of the study, conducted between 2000 and 2005, were reported in the June 8 online edition of the American Journal of Clinical Nutrition.

“The findings are very exciting. They confirm what a number of vitamin D proponents have suspected for some time but that, until now, have not been substantiated through clinical trial,” said principal investigator Joan Lappe, Ph.D., R.N., Creighton professor of medicine and holder of the Criss/Beirne Endowed Chair in the School of Nursing. “Vitamin D is a critical tool in fighting cancer as well as many other diseases.”

Source: Creighton University

Dr. Wegmann

Dr. Michael Wegmann's Thoughts:


Deficiency of vitamin D can result from a number of factors: inadequate intake coupled with inadequate sunlight (UVB) exposure, disorders that limit its absorption from the gastrointestinal tract, conditions that impair conversion of vitamin D into active metabolites, such as liver or kidney disorders and body characteristics such as skin color and body fat. Rarely, deficiency can result from a number of hereditary disorders. Deficiency results in impaired bone mineralization, and leads to bone softening diseases including:


A childhood disease characterized by impeded growth, and deformity, of the long bones. Rickets was first described in the 17th century, by Daniel Whistler and Francis Glisson. The role of diet in the development of rickets was determined by Edward Mellanby between 1918–1920. By altering the diets of dogs raised in the absence of sunlight, he was able to establish unequivocally that rickets was linked with a deficiency of diet, and identified cod liver oil as an excellent anti-rackets agent. In 1921 Elmer McCollum identified a substance found in certain fats that could prevent rickets. Prior to the fortification of milk products with vitamin D, rickets was a major public health problem. In the United States, the fortification of milk with 10 micrograms (400 IU) of vitamin D per quart in the 1930s led to a dramatic decline in the number of rickets cases.


A bone-thinning disorder that occurs exclusively in adults and is characterized by proximal muscle weakness and bone fragility. The effects of osteomalacia are thought to contribute to chronic musculoskeletal pain. A number of reports thus indicate that vitamin D deficiency may be related to various types of pain.


A condition characterized by reduced bone mineral density and increased bone fragility.

Vitamin D malnutrition may also be linked to an increased susceptibility to several chronic diseases, such as high blood pressure, tuberculosis, cancer, periodontal disease, multiple sclerosis, chronic pain, seasonal affective disorder, peripheral artery disease, cognitive impairment which includes memory loss and foggy brain, and several autoimmune diseases including type 1 diabetes (see role in immunomodulation).

There is an association between low vitamin D levels and Parkinson's disease, but whether Parkinson's causes low vitamin D levels, or whether low vitamin D levels play a role in the pathogenesis of Parkinson's disease has not been established. A resurgence of interest in vitamin D deficiency has led to continued studies on the topic and a focus on educating the consumer on the prevalence and degree of deficiency among the general public.

What Should Your Levels Be?

A blood calcidiol (25-hydroxy-vitamin D) level is the accepted way to determine vitamin D nutritional status. The optimal level of Vitamin D is 35–55 ng/mL

Here is a guide:

* 0-14.9 ng/mL = Severely deficient
* 15.0-31.9 ng/mL = Mildly deficient
* 32.0-100.0 ng/mL = Optimal
* >100.0 ng/mL = Toxicity possible

Without sufficient vitamin D, bones can become thin, or brittle. Deficiency can arise from inadequate intake coupled with inadequate sunlight exposure; disorders that limit its absorption; conditions that impair conversion of vitamin D into active metabolites, such as liver or kidney disorders; or, rarely, by a number of hereditary disorders. Vitamin D deficiency results in impaired bone mineralization and leads to bone softening diseases, rickets in children and osteomalacia in adults, and possibly contributes to osteoporosis.

Vitamin D plays a number of other roles in human health including inhibition of calcitonin release from the thyroid gland. Calcitonin acts directly on osteoclasts, resulting in inhibition of bone resorption and cartilage degradation. Vitamin D can also inhibit parathyroid hormone secretion from the parathyroid gland, modulate neuromuscular and immune function and reduce inflammation.

Make sure you supplement with a good quality liquid Vitamin D3

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