All I do now is buy the powder and make my own so I'll offer some advice. Inject yourself with BA or BB by itself, only then you will see they are never the problem. The problem is the hormone crystals . Test E is clumpy (for lack of a better word) so I mix, heat, stir, bake and then use a filter going into bottle. The filter seems to unclump the crystals and all is well. Test P is another story, seems it can come out of solution and so I heat and shake before drawing and injecting. It isn't painful anymore BUT I still get flu like symptoms, maybe just too strong being 200 per CC I don't know but years of trial and error on my part. Hope this helps.