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In an ideal world, no one would need dietary supplements. Our balanced diets would provide all the vitamins, minerals and other nutrients our bodies need. Alas, the world of American eating is far from ideal. And that, some nutrition experts and supplement advocates argue, is why we need dietary supplements. The latest federal data show that more than half of U.S. adults use dietary supplements, mostly multivitamins.
Since a healthy diet should provide most if not all of these vitamins and minerals, you likely will not need to take a prenatal supplement that contains 100% of the recommended daily allowance (RDA) listed below in the table.