What vitamin excess use is dangerous to health?

Excess of vitamin intake or vitamin overdose is called hypervitaminosis. It is a condition of high storage levels of vitamin, which can lead to toxicity.

Hypervitaminosis A is an excess of vitamin A, Similarly Hypervitaminosis C an excess of vitamin C, and so on.

High or toxic levels of vitamins occur when you have high supplement intake and when you do not take from dietary sources.