THE INFLUENCE OF AGE, STRAIN, CASTRATION AND ESTROGENS UPON HEPATIC STORES OF VITAMIN A IN THE MOUSE*

Abstract

The mean concn./g. of hepatic tissue was 337 units in females and 287 units in males (not significant). There was no difference in the concn. of vit. A in the livers of inbred and hybrid mice of the same age. The vit. A content of the livers of normal mice increased with age. The vit. A content of the livers of castrated mice increased more with age than normal mice. The increased concn. of vit. A in the livers of castrated mice was unaffected by sex, gain or loss of wt. or by the addition of subcut. placed pellets of estrone.