That's the finding of a large new study backed by the National Institutes of Health. It followed older Americans ages 51-71 who were all diabetes free at the start of the study. More than half reported taking multivitamins and or supplements routinely.
Scientists determined that taking these multivitamins had no positive or negative effect on future diabetes risk.
The study did find that users of vitamin C or calcium had a lower risk of diabetes than non-users. But they say the evidence for that was even "marginal".