Hypervitaminosis A, or vitamin A toxicity, occurs when you have too much vitamin A in your body. This condition may be acute or chronic.

If I am taking vitamin A, what is a reasonable dose? I have seen reports that taking too much can cause liver damage, but ...

However, excess vitamin A can apparently cause changes in skin color. The skin can turn dark yellow (carotenosis), especially on the palms of the hands and soles of the feet.

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Excess vitamin A can build up to abnormally high levels in the body, aka hypervitaminosis. "The upper limit for adults is 10,000 international units (about 3,000 micrograms) per day," says Czerwony.