How Much Vitamin D do Pre-Teen Girls Need?

In the winter, pre-teen girls may need more vitamin D to have healthy bones, according to a new study.  The research found that teen girls need a vitamin D intake of about 750 IU per day to have levels in their blood that allow for healthy bone growth.

This amount is higher than the U.S. Institute of Medicine's recommendation of 600 IU per day.

Reuters reports:

“... [W]earing sun block and not spending time outside can cut down on the vitamin D we get from the sun.”

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