Crystalline Vitamin B12 in the Nutrition of the Baby Pig

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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.