If you use Gentropin HGH you can get away with using less. I've heard of guys using 2-4 iu's a day and getting the results they want.I've used both the Hygetropins (Greens) and the generic blue tops. They both seemed to affect me the same. Both times I ran 8-10iu/day. First time was for 6 months, the second cycle was 8 months. I loved it both times. I only wish I had the money to run a full year at 20iu/day.