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Animal Protein Factor
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Animal Protein Factor was the name given to an animal food supplement discovered in the early 1950s. It was given to young food animals to increase their growth rate by as much as 10 to 15 percent. It was a by-product of antibiotic manufacturing, made from the crude dried solubles in the fermentation broths from which pharmaceutical antibiotics are manufactured. It was marketed as a free-flowing powder. The active principle was later identified as Vitamin B-12 |
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