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Polar bears, along with other fish-eating carnivores of the polar regions, concentrate large amounts of vitamin A in their liver -- so much, in fact, that the livers of polar bears, seals, and even huskies can be toxic. Ingestion of polar bear livers and huskie livers has been reported to cause hypervitaminosis A in [[Polar Explorers]].

Polar bears, along with other fish-eating carnivores of the polar regions, concentrate large amounts of vitamin A in their liver -- so much, in fact, that the livers of polar bears, seals, and even huskies can be toxic. Ingestion of polar bear livers and huskie livers has been reported to cause [[Hypervitaminosis A]] in [[Polar Explorers]].  Acute toxicity can result from ingesting more than 300,000 IU, which is only about 10-15g of polar bear liver.

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|+ '''Vitamin A levels (Retinol, i.u./g) in the liver of various animals'''

|+ '''Vitamin A levels (Retinol, IU/g) in the liver of various animals'''

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