Vitamin A content in International Units (I.U.) per gm of food:
Ox liver 550
Cod liver oil 600
Halibut liver oil 30,000
Common name/ Zoological name/ Vitamin A content of the liver
in International Units (I.U.) per gm of specimen:
Weddel Seal (Leptonychotes weddelli) 444
Man (Homo sapiens) 575
Southern Elephant Seal (Mirounga leonina) 1,160
Antarctic huskies (Canis familiaris) 10,570
Arctic bearded seal (Erignathus barbatus) 12,000-14,000
Polar bear (Thalarctos maritimus) 24,000-35,000