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TIL eating 1 gram polar bear liver can be fatal due to an overdose of vitamin A that makes your skin fall off (animals.howstuffworks.com)
A healthy human liver contains 575 international units (IU) of vitamin A per gram while a polar bear’s liver contains between 24,000 and 35,000 IU per gram. Compare that to the tolerable upper level of vitamin A intake for a healthy adult human: 10,000. Signs of toxicity generally occur when approximately 25,000 to 33,000 IU...