So does Denkall. It hurts like hell too, for some reason. I don't think it has anything to do with the amount of product that has to be dissolved into the water-base, since I never had any pain back in the day, from the Steris 100mg 30ml vials. I think that they(Denkall) may have just added too much BA for the initial batches. Also, it isn't micronized, since it has definitely been clogging my 25g pins. PLUS, I am getting the worst test-flu of my life, but I'll stick it out until that subsides. On the flip-side, my Deadlifts are through the roof!