Anyone have experience with this? It's the one of the active ingredients in the supp SPIKE made by Biotest. SPIKE is discussed in the stimulant roundtable and seems to be one of the hotter stimulant supps out right now. Sulbutiamine has a load of benefits it seems, improved cognitive function, mental clarity, increased alertness, better sleep etc. Sounds perfect for the lethargic feeling on-cycle and will fuel many a hard work out.

So, anyone used it?