Abstract
After thiamine, TAD or TPD was infused into the intestinal canal, blood levels of each in ve. intestinales and a. femoralis were determined, and it was confirmed that both TAD and TPD were absorbed more rapidly than thiamine in the intestines. At the same time, the contents of thiamine and TAD or TPD in the intestinal contents were assayed after TAD or TPD was infused into the intestinal canal, and it was found that a considerable amount of either TAD or TPD was reduced to thiamine readily in intestinal canal.
