Abstract
Several fundamental studies were made on the function of riboflavin in the skin. Total riboflavin contents of cutaneous tissues of various animals were 0.5 to 1.0 μg/g on fresh basis, and the ratio of FAD. FMN and free riboflavin was about 6 : 3 : 1. Total riboflavin content was abundant according to the pigmentation of the skin. FAD-^<14>C and FMN were synthesized in the skin homogenate from added riboflavin-^<14>C. Intraperitonealy injected riboflavin-^<14>C was incorporated into FAD, FMN and riboflavin in rat's skin.
