Effect of Dietary Fat on Requirement of Vitamin B 12 by the Chick. ∗

Abstract

Summary

Incorporation of 20% fat into a corn-soybean oil meal diet increased ten to twenty-fold the vit. B₁₂ requirement of non-depleted chicks for optimal growth at 4 weeks of age. The requirement was between 0 and 5 γ per kg of diet (3% fat) and between 50 and 100 γ with the high fat diet. The high dietary fat did not deplete the chick of its vit. B₁₂ liver store or alter the absorption of dietary vit. B₁₂ and its subsequent storage in the liver.