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American Journal of Clinical Nutrition, Vol 23, 105-109, Copyright © 1970 by The American Society for Clinical Nutrition, Inc.

Absorption of Dietary Carotenes in Human Subjects

C. NAGESWARA RAO B.SC., DIP. DIET.1 and B. S. NARASINGA RAO B.SC. (HONS.), PH.D.1

1 From the Nutrition Research Laboratories, Indian Council of Medical Research, Tarnaka, Hyderabad-7, India

The absorption of carotenes from a leafy vegetable, a root vegetable, a fruit, crystalline beta-carotene, and a mixed vegetable source in four adult male volunteers on diets low in fat was studied.

While crystalline beta-carotene was completely absorbed, the mean percentage absorption of carotene from amaranth (Amarantus tricolor), carrot (Daucus carota), papaya (Carica papaya), and the mixed vegetable source were 58, 36, 46, and 33, respectively.

Although absorption of beta-carotene from foodstuffs was much better than the other carotenes, it was not as high as pure beta-carotene, and that of agr-carotene from carrots was found to be less than the beta-carotene.

It appears from the present study that availability of carotene from vegetable foods may be 50% or more.




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