I prefer Hyge. Not as expensive as the big pharm brands, but high quality and works great. I would inject it IM, intra muscular, into an area that doesn't have a thick layer of fat. I'd just a 1/2 in insulin pin. Tricep and delts work well for these shots. I would not worry about aspiration. I never do with these shots and if you happened to inject part or all of your shot into a vein, you would still be fine. After all, gh can be injected IV