Think of vitamins as building materials on a construction job.
If you don’t have enough materials, work goes slowly because you have to wait for them.
If you have enough materials, work goes quickly, because there is no waiting.
If you have an excess of materials, work doesn’t go more quickly, because the work takes the same amount of labor.
So multivitamins “work” in the sense that you will absorb some of the vitamins, although not all, because your GI tract is no where near 100% efficient.
But consuming an excess of vitamins and minerals offers absolutely no health benefit whatsoever.
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