Abstract
The absorption of carotene in human adults was 63-84% with pure β-carotene oily solution and 24-33% with cooked carrot. The excretion of carotene in the feces during the periods of administration and depletion varied individually under the same experimental conditions. In the same subject changes in the rate of absorption were found under slightly different experimental conditions, and this seemed to be due to the composition of basal diet or the bodily condition of the subject such as fever, etc. Both alumina and calcium hydroxide chromatographies could be used to determine carotene in feces.
