Well i ran test at 5% ba and a tried a different one at 1% ba. The 5% made me feel like i got punched in the arm for a few days, the 1% would bother me a little bit, but nothing compared to the 5%. Of course there could be other variables in this as both were from UG labs. But im going to have to think the one with 5% ba is probably cleaner as it was a new lab at the time and they were trying to establish a name. Unless the 5% was more potent and i am sensitive to the enanthate esther. I cant know for sure yet as i havent ran UG lab shit since and will never again now that i make my own. I try to keep my BA % low to avoid having painful gear. That's why i said i "believe" i am sensitive to BA. Regardless, i dont know for sure what the powder is, could be Winstrol (winny), cyb, or base for all i know.