Relationship of Corn Diets to Nicotinic Acid Deficiency in Growing Pigs

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Abstract
Two expts. are reported in which no evidence of nicotinic acid deficiency could be noted in growing pigs receiving over a period of 11 weeks diets containing 80% and 84% of corn, respectively, and supplying 0.7 to 0.82 mg. nicotinic acid per kg. live wt. per day. In a 3d expt., marked to severe nicotinic acid deficiency symptoms resulted in a 6-week period in groups of pigs receiving diets containing 0, 40% and 70% corn combined with casein and other purified materials to bring the protein level to 22.2 to 22.6%, and supplying 0.08, 0.36 and 0.47 mg. nicotinic acid per kg. live wt. per day. Definite deficiency symptoms were noted in the pigs receiving no corn; they were conspicuously aggravated in the pigs receiving 40% corn and but little aggravated in the pigs receiving 70% corn. The pellagragenic effect of corn may not necessarily be an anti-nicotinic acid effect.

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