Margherita T. Cantorna

  • Distinguished Professor of Molecular Immunology, Penn State
Vitamin D is sometimes called the sunshine vitamin. FotoHelin/Shutterstock.com

Why you need more Vitamin D in the winter

Vitamin D is essential for good health and particularly for fighting infections and keeping the microbes in the human gut healthy. But in winter it can be difficult to get enough.

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  • Location: University Park, Pennsylvania, U.S.
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