Abstract
BRIGGS, Mills, Elvehjem and Hart (1942) demonstrated that although the young chick could synthesize niacin (Dann and Handler, 1941; Snell and Quarles, 1941) the rate of synthesis was too slow to meet the optimum requirement. They found that the entire mouth cavity, the upper portion of the esophagus and the crop became inflamed with a deep red color. In their experiments the minimal level of niacin needed was 1.8 mgs. per 100 grams of diet. Briggs, Luckey, Teply, Elvehjem and Hart (1943a) presented data to confirm the previous work. Since that time, Childs, Carrick and Hauge (1952) have reported that the niacin requirement for rapid growth was adequately met with a dietary level of 2.8 mgs. of niacin per 100 gms. of feed. They also concluded that the chicken is dependent upon a dietary supply of niacin until at least 8 weeks of age. Using the data at hand the …
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