I found that the halo made me strong and vascular as hell. I did not notice an increase for the first few days. My buddy has taken it and it effected him differently. He gets aggressive, so the pump from that made him lift more. Are you taking other gear? If not I would not take it...it will mess your hormones up too much. What I mean is that if you are just taking Halo on and off every few days for a strong workout, it will keep your blood levels all out of wack...just my opinion though!