Abstract
Summary
1. Purified rations have been successfully employed in studying nutritional requirements of adult mink. 2. Feeding highly purified vitamin B complex free rations of varying protein levels supplemented with thiamine, riboflavin, niacin, pyridoxine, pantothenic acid and choline produced a severe deficiency in 10 to 13 weeks. The characteristic symptoms are given. 3. The administration of synthetic folk acid to 8 mink at the time of severe deficiency symptoms resulted in an immediate recovery, whereas 3 mink not receiving folic acid died. 4. Preliminary observation indicates the existence of another factor present in liver distinct from the known vitamins which is seemingly necessary for maintenance of body weight and hemoglobin regeneration.
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