Harvard Health Letter

Vitamin D: Enjoying its day in the sun

New study summing up anticancer research adds to its luster.

We met someone the other day who had just been told by his doctor to give up his daily vitamin E pill. The vitamin's reputation has slid as studies have challenged the view that it prevents heart disease, Alzheimer's disease, or cancer — and in the large daily doses of 400 International Units (IU) that people have been taking, it may actually do harm. "But," our health-conscious acquaintance asked, "should I be taking vitamin D instead?"

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