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Department of Physiology and Pharmacology, and Department of Medicine, Northwestern University Medical School, Chicago, Illinois
Research Laboratories, Swift and Company, Chicago, Illinois
Studies upon nearly 400 chicks given various gizzard erosion producing diets fail to reveal any unequivocal protective action of commercial or purified chondroitin sulfuric acid. This substance does appear, under certain conditions, to have a favorable effect upon growth. It is suggested that any slight influence upon gizzard erosion may be the result of a general nutritional improvement rather than the action of a specifically protective substance. Incidental observations upon chicks receiving gizzard erosion producing diets are discussed.