The Role of “Folic Acid” and Biotin in the Nutrition of the Rat

Abstract
The inhibition of growth and increase in prothrombin time brought about by the inclusion of succinylsulfathiazole in highly purified rations adequate in the well-recognized members of the vitamin B complex could be largely overcome by supplements of a “folic acid” concentrate and crystalline biotin. The relationship of “folic acid” and biotin to bacterial activity in the intestine is discussed.