Abstract
By admininistering TPD-^<35>S into the intestinal canal of dogs and rats, ^<35>S, total and free thiamine, and TPD in the intestinal canal, intestestinal and mesenteric veins were estimated. It was revealed that TPD, which passed to the tissues of the intestine immediately after administration, was converted to thiamine on liberating propylsulfide and was reduced in the tissues, and thiamine thus formed reached the liver by way of the mesenteric and portal veins.
