Though some people might need more of specific vitamins, multivitamins don't help most people, studies say. iStockphoto hide caption

toggle caption iStockphoto

If only it was as simple as popping a supplement and being set for life. But alas, no. hide caption

toggle caption

Ads often tout dietary supplements and vitamins as "natural" remedies. But studies show megadoses of some vitamins can actually boost the risk of heart disease and cancer, warns Dr. Paul Offit. hide caption

toggle caption

In Washington's Columbia Heights neighborhood, Claire Robertson, a grad student, talks with Scott Hensley about retail health clinics. David Schultz/NPR hide caption

toggle caption David Schultz/NPR

NPR thanks our sponsors

Become an NPR sponsor