If it's prohibited, it's prohibited.But some the testing does with Tb4, as I have been told showed little to no difference as I said above to a control group. while the person I talked too could see the reasoning ASADA put it in the S2 catagory, it's probably no where near as clear as some make out. But said eh wouldn't go down that rouse as you'd likely need a lot of scientific testing and analysts to get a clear answer. That wouldprobably cost millions.