Abstract
Summary
Vitamin A in the diet affects the magnitude of urea clearance in the rat. In avitaminosis A there is a 23 to 77% decrease in urea clearance. Urine examination and histological sections of the kidney showed no marked morphological alteration. It is a functional deficiency.
Administration of carotene in 5 of 7 rats resulted in a 30 to 170% increase in urea clearance above the level in avitaminosis A.
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