rapid and essentially synchronous vitamin a deficiency was induced by the withdrawal of retinoic acid from mature ( 190 -- 210 g ) stringently vitamin a-deficient male rats reared by feeding early growth plateau ( 60 -- 70 g ) vitamin a-deprived rats diets first supplemented with and then lacking in 2 micrograms retinoic acid per gram diet in repeating 18 day:10 day supplementation : deprivation cycles .
C0042842
vitamin a deficiency
C0042839
vitamin a