Been on HGH for 4 months and my IGF-1 has barely increased. I feel great, workouts/recover is unreal and even lately notice a little numbness in my hands (good sign). But my level went from 200 to 205 in four months taking over a unit a day, 7 days a week. I did get my levels check, nearly 12 hours after my last dose...you think that matters? BTW, I know for a fact, I'm taking US pharma grade.