Untersuchungen über carotin-vitamin A im menschlichen organismus

The role of carotene in human health

“…In many individuals carotene is present in the blood in amounts too small to be determined, that is, less than 0.1 gamma per cc. Thus, Kauffmann and Drigalski (32) found 85% of persons studied had blood carotene in amounts less than 0.1 gamma per cc., while in the 15% having detectable amounts, the highest value was 2.7 gamma per cc. When carotene was administered to cases previously giving negative tests, a latent period occurred before an increase could be detected, which they ascribed to absorption of the pigment by the organs; there was no latent period in cases already showing carotene in the blood.…”

Fat-Soluble Vitamins

“…Vitamin A in urine.-Since vitamin A is fat-soluble rather than water-soluble its absence from nOf' trlal urine (82,83,84) is to be ex pected. It has however been detected in human urines from patients suffering from cancer (85), chronic nephritis, nephrosis, pneumonia, cirrhosis of the liver, and icterus with closure of the bile duct (8 6,91), tuberculosis, and chrcnic infections (87).…”