But in general, multivitamins are not dangerous

While there are certainly risks involved with consuming dietary supplements, and there’s no proof that multivitamins offer any significant benefits aside from a slightly reduced risk for cancer, HMS said the results from PHS II didn’t show any evidence to support that taking a multivitamin is dangerous. In fact, Gaziano said that for many Americans it may be a good idea for preventing deficiencies. “Many Americans don’t get what they need,” he said.