Don't Take Just Any Multivitamin
While supplements can help us fill in some of the gaps in our daily diet, Bob's issue is that they're often sold as one-size-fits-all problem solvers. He uses women's multivitamins with folic acid as an example. "Folic acid at RDA levels is a must for women who are pregnant or planning to have children soon," says Bob, "But it's looking as if half that amount in a multivitamin might be right for women who are past that point in their lives—or for men." Some studies have even suggested a link between an excess of folic acid and cancer.