JoAnn E. Manson is chief of preventive medicine at Brigham and Women’s Hospital and professor of medicine at Harvard Medical School. Q: I keep hearing about the benefits of vitamin D and worry that I’m not getting enough. Is it really necessary to take a supplement? A: For years people have thought of vitamin D …
Advice | Ask a Doctor: How Much Vitamin D Do I Need? Should I take a supplement? Read More »
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