I'm also on 4 IU daily and haven't seen any drop in reta's appetite effect. Might just need to go up to 5 or 6 mg soon.
At about 4 mg reta my appetite control was decent before. Digestion still slows and I fill up fast, but the hunger reduction has faded since I added 2-3 IU HGH daily three or four weeks ago. Even pushing past 4 mg a week now barely touches cravings the way it used to. I read that HGH can raise ghrelin and wondered if that might be counteracting the GLP-1 action.