Common dietary sources of performed vitamin A are liver, milk and milk products, eggs and fish
The richest sources are liver oils of fish, such as shark, halibut and cod, and of marine mammals, such as polar bear
The livers of ox, sheep, calves or chicken also contain vitamin A at concentrations comparable to cod liver oil
Eggs, milk and other dairy products: butter and cheese, are all moderate sources
Provitamin A carotenoids are found in yellow and orange fruit and vegetables, and in dark green leafy vegetables