21... so you have the peak test of your life and want to cycle why............. Honestly youd probly get great results without it and as history will show your prob not ready to even cycle. Thats all dependant on how long youve been training, bf%, ect. If you havent already purchased hcgenerate, unleashed, and post cycle do it now for your pct. 2 bottles of HCgen for while on and pct. You shouldnt but if you do high strength gains are the most typical out come, lean weight gain (diet pending) is anywhere from 10-20 lbs.