Natural Factors Benfotiamine B1The most metabolically active form of vitamin B1. Natural Factors Benfotiamine provides a superior source of thiamine compared to thiamine hydrochloride as it provides a higher bioavailability of thiamine. This formula combines 150 mg of benfotiamine with 10 mg of bioactive thiamine diphosphate to support nerve function and energy metabolism, alongside Farm Fresh Factors a bioenergetic blend of phytonutrients from whole foods. Upgrade your standard B1