I kept about 10 lbs because my vial was underdosed and i wasn't very knowledgable about roids at the time, didnt know how to get my test back up to par, so with about 4 weeks of test E, with no PCT, i gained 30, kept about 10-15. PCT is where you get to keep a lot more. you may have acne for a little while, and it might not even be on your face, but once your off its not gonna stay