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Vitamin D, breast cancer, and chemotherapy: A look at the research

Posted on: July 5, 2012   by  John Cannell, MD


In 2008, breast cancer killed 458,503 women worldwide. The incidence of breast cancer varies greatly around the world; the further you live from the equator, the higher the risk. Rates have increased significantly since the 1970s.

In 2009, Professor Cedric Garland’s group at the University of California at San Diego estimated that maintaining a 25(OH)D level between 40-60 ng/ml would prevent 75% of new cases in the USA.

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3 Responses to Vitamin D, breast cancer, and chemotherapy: A look at the research

  1. [email protected]

    Yes, vitamin D gets used up in fighting many attacks on the body, such as cancer, surgery, trauma, and even earthquakes.
    Yes, extra vitamin D is important to have during all of those situations: http://www.vitamindwiki.com/tiki-browse_categories.php?parentId=64&sort_mode=created_desc
    BUT, be careful with extra vitamin D with Chemotherapy. Vitamin D amplifies many Chemo therapies by about 3X – which is great if the doctor will reduce the chemo dose by 3X, but can be lethal if the doctor keeps with the chemo dose which had been developed for most of the population, who are vitamin D deficient. See the data and the chart of your 4 options for vitamin D and chemotherapy http://is.gd/chemoD

  2. [email protected]

    I know this 17 or 18 years old lady that had stage 4 cancer in her digestive region who had been taking 10,000 IU of D3 a day at the recommendation of her oncologist (based in Dallas-Ft Worth) while undergoing chemotherapy (not sure how many rounds, maybe 18 total?).

    She looked remarkable healthy the entire time and she beat stage 4 cancer. You’d never know she had cancer the whole time.

  3. jmeshon

    Regarding the comment above by hlahore – it would seem that more vitamin D along with a reduction in chemotherapy should be studied. If it could be as effective one would think it would be far less tramautic to patients’ systems.

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