Pure Pharmaceutical Grade. Fat-Soluble Form of Thiamine (Vitamin B-1). 150 mg per Capsule. Benfotiamine is a more bioavailable and physiologically active derivative of Thiamine. Unlike regular thiamine a water-soluble nutrient also known as Vitamin B-1 Benfotiamine is lipid (fat) soluble. Benfotiamine readily passes through intestinal mucosal cells where it is converted into physiologically active thiamine. And clinical research has shown that Benfotiamine’s unique open-ringed structure making it a fat-soluble nutrient increases its bioavailability.