Interpretations of requirements for thiamin, riboflavin, niacin-tryptophan, and vitamin E plus comments on balance studies and vitamin B-6

: Data from the long-term projects sponsored by the Food and Nutrition Board to determine the requirements for thiamin, riboflavin, niacin-tryptophan, and vitamin E are utilized to effect an opinion regarding the recommended dietary allowances for these vitamins. Based upon data obtained during these and subsequent research projects, comments on balance studies, changes in tissue lipids, and the requirements for vitamin B-6 are included. The possibility that antioxidants may have an effect on delaying oncogenesis is discussed.