A panel of respected physicians has written a major paper advising the public against 'wasting money' on multivitamins. Their report analysed 27 clinical studies: "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. These vitamins should not be used for chronic disease prevention. Enough is enough."
Source:https://annals.org/aim/fullarticle/1789253/enough-enough-stop-wasting-money-vitamin-mineral-supplements