Abstract
When vitamin A was taken up to an amount of 13mg by ingesting as cod-liver oil, only a very small part was excreted in feces. The vitamin seems therefore to have been absorbed almost entirely from the intestinal wall. When from 19 to 302 mg of the vitamin were given as vitamin A palmitate dissolved in liver oil, the ratio of the amount absorbed to that ingested fell with increase in the amount administered. The maximum absorption seemed to be about 70 mg. The vitamin was proved to be relatively labile in feces so that the amount of the vitamin assumed to have been absorbed may include some vitamin oxidized in the intestines.
