Investigations into vitamin A-free basal diets. I

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Abstract
I. Rats fed on vit.-A-free diets presented various types of anomaly, both during the preparatory "running-out period" and under curative treatment. Growth under curative treatment was not resumed to an extent equal to that of normal rats receiving stock diets. The diets seemed deficient in more than vit. A.[long dash]II. Of 3 groups of 6 rats each fed on (1) a stock diet, (2) a vit.-A-supplemented vit.-A-free basal diet, and the basal diet respectively, those in the 1st group grew more rapidly and weighed more after 150 days than those in the 2d group. Those in the 3d group just ceased to gain wt. at the end of 150 days. The liver reserves of vit. A in each animal, estimated by Moore''s method, were consistent with growth performance.