Hypervitaminosis

While vitamins are important in maintaining health, excessive levels of vitamins can lead to vitamin poisoning (hypervitaminosis).

Some of the vitamins most commonly linked to vitamin poisoning are Vitamin A, Vitamin B3, Vitamin B6, Vitamin C and Vitamin D. The medical names of the different kinds of excess are named after the vitamin; an excess of Vitamin A, for example, is called "hypervitaminosis A".

Excess doses of mineral supplements can also lead to poisoning. Hypervitaminosis, or mineral supplement poisoning, or both, can occur due to excessive intake of multivitamin supplements.