Ideally, we'd all eat super healthful diets. But that's not the world we live in, and multivitamins may help bridge the nutritional gaps. Jasper White/Getty Images hide caption
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The Original Grape-Nuts, which now bear a non-GMO label, no longer contain vitamins A, D, B-12 and B-2. Claire Eggers/NPR hide caption
Vitamin E for your heart? Don't bother, new guidelines say. iStockphoto hide caption
Though some people might need more of specific vitamins, multivitamins don't help most people, studies say. iStockphoto hide caption
If only it was as simple as popping a supplement and being set for life. But alas, no. iStockphoto.com hide 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. iStockphoto.com hide 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
Pfizer will drop or qualify some health claims on labels and in ads for Centrum vitamins and supplements. CSPI hide caption