抄録
Attempt was made to acknowledge the importance of furring for diagnosis of riboflavin-deficiency by determining total and esterified riboflavin in the blood, and observing lingual ariboflavinotic signs and angular stomatitis. 1) The patients showing these signs were divided into two groups, one with furring (group A) and the other without it (group B). The total blood riboflavin of the latter was lower than that of healthy persons, but that of the former was not aways so. 2) With regard to the amount of blood esterified riboflavin, it was found, as was expected, that it was lower in group B than in healthy subjects, but it should be emphasized that this was also the case in group A. The real deficient state in group A may therefore be regarded as to have been masked by the existence of free riboflavin. 3) The above results reveal that grout B is superior to group A in the degree of riboflavin-deficiency and that furring may be used as an indicator for judging the grade of deficiency.
