Dietary Sources and Nutritional Equivalency

Preformed vitamin A is present at highest concentration in liver and fish oils, and at lower concentrations in nonorgan meats. Food sources of preformed vitamin A and provitamin A are provided in Table 1. In 1990, 39% of the vitamin A (including carotenes) in the diets of Americans came from fruits and vegetables. Meats and dairy products each supplied about 20% of the vitamin A consumed. Foods that contain small amounts of vitamin A can

Table 1 Food sources of vitamin A

Food

%DV*

Animal sources of preformed vitamin A

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