Some people have genetic mutations that mean they need 10x more of one Vitamin than other people. If you want to make sure that you are actually getting enough of all Vitamins, doing a 23andMe test can be helpful to see whether you have any mutations that change your Vitamin needs.
Otherwise, there’s the general result that broad-spectrum multivitamins don’t seem to be healthy in the normal population (there are some results that might be helpful for some poor people).
This suggests that you likely get some negative effects if you consume too much of many nutrients.
Some people have genetic mutations that mean they need 10x more of one Vitamin than other people. If you want to make sure that you are actually getting enough of all Vitamins, doing a 23andMe test can be helpful to see whether you have any mutations that change your Vitamin needs.
Otherwise, there’s the general result that broad-spectrum multivitamins don’t seem to be healthy in the normal population (there are some results that might be helpful for some poor people).
This suggests that you likely get some negative effects if you consume too much of many nutrients.