Effect of Vitamin B12 and Folic Acid on Growth and Uricemia of Chickens Fed High Levels of Glycine

Abstract
Addition of 3, 6, and 9% glycine to vitamin B12-deficient diets caused a growth depression and increased mortality in growing chickens. Both vitamin B12 and folic acid function in counteracting this toxicity; however, B12 is somewhat more effective. Addition of 6 or 9% glycine to the diet increased blood uric acid levels. Folic acid tended to decrease these high levels of uric acid in the blood. Vitamin B12 tends to increase the level of uric acid in the blood of young chickens.