Thiamax, one of the leading thiamine supplements in the US, contains thiamine tetrahydrofurfuryl disulfide, a derivative of thiamine (vitamin B1) with high bioavailability, making it the perfect natural supplement to improve your thiamine status. TTFD, the main ingredient in Thiamax, has displayed the ability to cross the blood-brain-barrier and can bypass normal routes of thiamine absorption, with a higher rate of uptake both in the gut and at the cellular level. It also includes a small amount of magnesium (as magnesium taurate), which plays an important role in supporting how your cells can use thiamine.