[Variations of retinol-C14 incorporation in rats of different ages fed a vitamin A-free diet].

Two groups of Wistar strain male albino rats of different age were treated with a large dose (300 I.U.) of vitamin A-acetate, after 24 h fasting. Each rat was then administered orally a single dose of 1,25mu C retinol-C14 to determine the rate of incorporation into different tissues. At intervals of 3 h and of 3, 6, 12 days the rats were killed; liver, kidney, blood, white fat tissue, brown fat tissue were taken and dried. Radioactivity was measured. The results show that in all tissue the mean percentage of incorporation, expressed in muC/g dry tissue, is generally higher in young than in adult rats.