Crystalline Vitamin B12 in the Nutrition of the Baby Pig

Abstract

Crystalline vitamin B₁₂ has been shown to be required by the baby pig. This vitamin and a pernicious anemia liver extract, when injected to supply approximately equal amounts of vitamin B₁₂ potency, produced equal responses in growth rate. The equality in growth response indicates that vitamin B₁₂ is the growth factor being supplied by the antipernicious anemia liver extract. The relation between the deficiency produced in baby pigs and pernicious anemia in man is discussed.