We believe that the case is closed — supplementing the diet of well-nourished adults with (most) mineral or vitamin supplements has no clear benefit and might even be harmful,” concluded the authors of the editorial summarizing the new research papers, published Dec. 16 in the Annals of Internal Medicine. “These vitamins should not be used for chronic disease prevention. Enough is enough.

Multivitamins won’t boost health, waste of money: Researchers – CBS News

Good to hear it (one more time) so definitively.

TL,DR; of the whole thing: Multivitamin use is useless at best, slightly detrimental at worst. Don’t waste your money.