IVACG: The Bioavailability of Dietary Carotenoids: Current Concepts

Our current knowledge about the bioavailability of provitamin A carotenoids is insufficient, fragmentary, and difficult to interpret. Nonetheless, provitamin A-containing foods, commonly available and eaten in almost all societies of the world, are generally able to meet the minimum vitamin A requirements of humans. Such foods must be prepared properly and eaten in sufficient quantities, however, to achieve this effect. Furthermore, any single average ratio for the conversion of carotenoids into vitamin A is at best a rough estimate that is not valid for all diets.

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