Thiamine and Riboflavin Intakes and Excretions during Pregnancy

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Abstract
The thiamine and riboflavin intakes, excretions and test dose returns of 15 pregnant women on self-selected diets were determined. Intakes of other nutrients were calculated. With the exception of calories, the intakes of 5 subjects approximated the recommended allowances of the Food and Nutrition Board of the National Research Council. The intakes of all nutrients by the remainder of the group were definitely below the recommended allowances, with 4 of the subjects having extremely poor diets. The course of the pregnancies, the condition of the infants at birth, and the postnatal development of the infants did not appear to be correlated with the quality of the prenatal diets of the mothers. When compared with data on non-pregnant women on similar intakes, neither the returns of thiamine and riboflavin test doses nor the daily excretions of these vitamins indicated an increased need for them during a normal pregnancy.

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