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Ask Tufts Experts February 2014 Issue

Q. The vitamin D supplement I take also contains calcium carbonate, cellulose gel, maltodextrin, croscarmellose sodium, stearic acid, magnesium stearate and corn starch. Only vitamin D3 is listed in the Supplement Facts label. Do these other ingredients have any nutritional value? Are they safe?

A. Bess Dawson-Hughes, MD, director of Tufts’ HNRCA Bone Metabolism Laboratory, answers: “The amount of calcium present is very small and so not very consequential. The other ingredients have negligible nutritional value, are commonly used, and I know of no evidence that they are unsafe.”

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