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BellaOnline's Gynecology Editor


Calcium and Vitamin D Intake Decreases Risk of Breast Cancer

Guest Author - A. Maria Hester, M.D.

Several recent scientific studies show that there is an inverse relationship between intake of calcium and vitamin D and the risk a premenopausal woman has of developing breast cancer. In other words, women who have a higher intake of calcium and vitamin D, both in their diets and through supplement use, have a lower risk of developing breast cancer.

There have been a variety of studies, including one by Harvard University and one through the Women’s Health Study. The latter study included 10,578 premenopausal and 20,909 postmenopausal women who completed questionnaires regarding lifestyle, medical history, and food frequency.

There were 131 items in the food frequency questionnaire. Average intake was evaluated using 9 potential responses which ranged from “6 or more times daily” to “less than once per month or never.” Participants also reported their use of calcium supplements and multivitamins and made note of the duration and dosage of these supplements.

The authors found that dairy products accounted for 53% and 39% of total calcium and vitamin D intakes, respectively, while supplements made up 22% and 30% of intakes. The average daily intake of calcium was 1,021 mg/day, while that of vitamin D was 353 IU/day.

Participants were followed for an average of 10 years. During this time, 276 premenopausal and 743 postmenopausal women developed invasive breast cancer.
Among the women in this study, the premenopausal women with the highest intake of calcium and vitamin D had close to a 40% lower risk of develop breast cancer compared to their study counterparts with the lowest intake of these nutrients. However, this same trend was not seen in postmenopausal women. As a matter of fact, there was no statistically significant association between breast cancer and a higher intake of calcium and vitamin D among women who had gone through the menopause.

The famous saying, “Milk, it does a body well,” means more today than it did in the past.

October is breast cancer awareness month and we should all make a special effort to fight this deadly disease. There are so many things that we can do. Simply spreading the word about the decreased risk of breast cancer in premenopausal women with a high intake of calcium and vitamin D has the potential to save lives. Getting scheduled for our mammograms and encouraging friends, family members, and co-workers to do the same is also crucial.

While the simple mention of the words “breast cancer” strikes fear deep in the hearts of millions of women, our best defense may be a well thought out offense. WE SHOULD DO all we can to prevent the disease, or at least catch it early. We can, and should, also make educating others about this disease a top priority. Words really can save live.

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Content copyright © 2014 by A. Maria Hester, M.D.. All rights reserved.
This content was written by A. Maria Hester, M.D.. If you wish to use this content in any manner, you need written permission. Contact Dr. Denise Howard for details.


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