Bear-y interesting

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In reviewing for our upcoming biochem exam, I read the following in one of my biochemistry textbooks concerning Vitamin A:

“Vitamin A accumulates in the liver. Intake of large amounts [25-50 kRE/day over time] can be toxic…It is virtually impossible to ingest toxic amounts of vitamin A from normal foods unless one eats polar bear liver (6000 RE/g) regularly.”
    –Devlin’s Textbook of Biochemistry With Clinical Correlations

Mmmmm…polar bear liver….