Top ten fibs

[Big King Sanctaphrax]

Carotenemia or hypercarotenemia is excess carotene, and unlike excess Vitamin A is non-toxic. Although hypercarotenemia is not particularly dangerous, it can lead to a yellowing of the skin (carotenodermia). It is most commonly associated with consumption of an abundance of carrots, but it also can be a medical sign of more dangerous conditions.

Yes, an excess of vitamin A will kill you-but according to wikipedia, an excess of carotene can't. So keep on eating those carrots, people!

Edit-Apparently, it's not only polar bear livers that will give you a fatal does of vitamin a-

The livers of certain animals, especially those adapted to polar environments, often contain amounts of vitamin A that would be toxic to humans. Thus, vitamin A toxicity is typically reported in arctic explorers and people taking large doses of synthetic vitamin A. The first documented death due to vitamin A poisoning was Xavier Mertz, a Swiss scientist who died in January 1913 on an Antarctic expedition that had lost its food supplies and fell to eating its sled dogs. Mertz consumed lethal amounts of vitamin A by eating the dogs' livers.