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United States Department of Agriculture

Agricultural Research Service

Research Studies



·          Bioavailability of beta-cryptoxanthin

Compared the apparent absorption of beta-carotene, beta-cryptoxanthin, and alpha-carotene from typical diets. 

Beta-cryptoxanthin is much more bioavailable from its major food sources than are beta-carotene or alpha-carotene, the other common vitamin A-forming carotenoids. 

This would mean that mandarin oranges, oranges, and a variety of other orange fruits are better sources of vitamin A than has been assumed. 

Investigating the absorption and metabolism of beta-cryptoxanthin, and how it forms vitamin A in humans, gerbils, and by chemical simulations.    


·          Testing biofortified cassava for vitamin A deficiency prevention

Will shortly begin

using biofortified cassava (developed by CIAT in collaboration with HarvestPlus). 

These new varieties of cassava have been cultivated to contain high concentrations of beta-carotene.       




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Last Modified: 8/18/2011
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