抄録
Riboflavin content was estimated by the lumiflavin method with urine specimens collected from 8 a.m. to noon for successive two days. The subjects examined were divided into two groups : In group 1,40 boys from 8 to 10 years of age with clinical signs of nutritional dystrophy were used. Group 2 consisted of 40 boys with the same range of age without nutritional dystrophy. Riboflavin concentration in the forenoon urine was 2.8±0.7μg% and 8.0±2.0μg% in groups 1 and 2 respectively. The absolute amount of riboflavin in the two forenoon urine was 11.4±2.5μg and 32.0±8.1μg in groups 1 and 2 respectively. It may be concluded that urinary output of riboflavin was lower in the boys with nutritional dystrophy than in those without it.
