correct presser, HGH is not a controlled sub. meaning it is not scheduled like AAS, its like buying clomid or humalog, or t3 in mexico, you can legally declare up to a 3 months supply when coming back and they cant do shit. I have seen this first hand. Had a border guard ask me "so you didnt buy any steroids in mexico, huh?" nope i replied. she said " so what do you do with this?" i said "doctors orders" to blow her off and that was the end of it. the bottom line is i dont have to tell them shit cuz its not doing anything wrong.
Or to avoid the hassle you can just pack it, however if they do find something legal that you failed to declare they can (if they are dicks) take it if they find it at that point. dumb rule.