dmjr here, and I'm doing about 4 to 5 units per day. This seems to be my sweet spot. I'm blown away that people are doing 10 times this amount! I wonder how much HGH Barry does or did. No question that I have a sensitivity to the drug. Just got a new shipment in and my doctor said that my sensitivity might have nothing to do with the HGH but the preservative in the drug. I don't know about that. I notice that I can eat more without worrying about putting on a bunch of fat. I also notice that my endurance is better as well as my muscle recovery, a little bit. I don't look much different I don't think but I'm also not working out as hard so maybe its working from that standpoint.