Benfotiamine (S-benzoylthiamine-O-monophosphate) is a derivative of thiamin, belonging to the family of compounds known as "allithiamines." Benfotiamine is fat-soluble and more bioavailable and physiologically active than thiamin. Benfotiamine raises the blood level of thiamin pyrophosphate (TPP), the biologically active co-enzyme of thiamin, and stimulates transketolase, a cellular enzyme essential for maintenance of normal glucose metabolic pathways.