Preschool children maintained on low and moderate carotene diets were given a single oral dose of 50,000 μg vitamin A palmitate.
On the low carotene diet, xerosis was observed in 8 weeks' time in the control group of children, and in 10 weeks' time in the children given the load of vitamin A. Statistical differences in serum vitamin A values between the groups were not of significance after 18 weeks.
Children on a moderate carotene diet did not benefit from the loading dose of vitamin A.
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