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Department of Biochemistry, College of Agriculture, University of Wisconsin, Madison
The survival of the progeny of female rats which were fed an all-plant diet was not increased by the subcutaneous injection of 0.05 µg of vitamin B12 within 6 hours after parturition. An increase in the concentration of urea in their blood was not found except when their stomachs contained no milk. Starvation and dehydration were found to result in an increase in the concentration of urea in the blood of young rats from females which were fed either an all-plant diet or this diet supplemented with fish solubles.
Manuscript received 1 February 1954.