Abstract

1. Six pre-school children with normal intestinal absorption were given 100000 μg of retinyl palmitate and 14·4 μCi of [11,12-3H]retinyl acetate. 2. The absorption, excretion and retention of the label were determined. 3. The children retained 23–54% of the label. 4. The inefficacy of the massive dose as a prophylaxis against deficiency is discussed.

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