Retinol is present in both plant and animal foodstuffs. Among plants, retinol is present in carrots, kales, spinach, tomatoes, pumpkin, sweet potato, broccoli, and mango amongst others. In animals, retinol is present in liver, eggs, whole milk, and fish. Animals provide preformed retinol while plants provide provitamin A. Preformed retinol is available as retinyl esters as it is complexed with esters, whereas provitamin A is present as carotenoids. Metabolism of retinyl esters and carotenoids produces retinol, which is an active molecule in the body.
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