you CAN die from a vitamon overdose.
For example if you iron is a metal
You will either be poisoned and u can die from those toxins if in excess
I know of a child that died from taking a few kids multi vitamins because the iron was too much.You can go to the hospital if its early enough and they can give u something im not sure what it is but it absorbs the iron.I ate a whole bottle of vitamin c tabs when i was about 4.I did get really sick for about a week with real bad tummy pains.Multivitamins are worse they have lots of diff things in them
Too much calcium can cause hypercalcification.Get the ingredients work out the dose i think u will be ok unless u took like 50 in one go.