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Multivitamins interfere with calcium absorption?

Page last modified on: September 9, 2008
Question from Sissy: Do some multivitamins interfere with the absorption of calcium?
Answer —Marisa Weiss, M.D., president and founder: You need vitamin D in order to absorb calcium properly. There are all kinds of vitamin and calcium supplements that are available in one pill. In fact, many of the calcium supplements also include vitamin D. You may need to try various kinds of calcium supplements until you find one or several that you tolerate well.

On Wednesday, August 21, 2002, our Ask-the-Expert Online Conference was called Keeping Your Bones StrongCharles L. Shapiro, M.D. and Marisa Weiss, M.D. answered your questions about how to measure the strength of your bones, how to find out your risk for osteoporosis, and what you can do to lower that risk.


The materials presented in these conferences do not necessarily reflect the views of breastcancer.org. A qualified healthcare professional should be consulted before using any therapeutic product or regimen discussed. All readers should verify all information and data before employing any therapies described here.

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Meet the Experts

Charles L. Shapiro, M.D.

Charles L. Shapiro, M.D. is a medical oncologist specializing in breast cancer, and associate professor at the Ohio State University Comprehensive Cancer Center. 

Marisa Weiss, M.D. is a radiation oncologist specializing in breast cancer and the founder, president, and guiding force behind Breastcancer.org.

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