To your point, there is a ton of gray area. One site I can responsibly link here is https://www.peptidesciences.com/ -- they're very careful about working to stay on the right side of the law, and they sell semaglutide and tirzepatide for ostensibly "not-for-human-consumption" (and at very, very high prices). So the raw ingredient, in non-medical settings, is not inherently impossible to import and sell legally. But I'm not fully convinced they're immune to lawsuits or legal action.
I'm gonna end the conversation here and let you have the last word, because I don't even feel comfortable talking about compounding pharmas.
From what I've read, sites like the above are really dangerous, because people are ordering from them and like you said, are NOT for human consumption.
Compound pharmacies, from what I understand, are meant for human consumption. From the healthcare people I know personally, including my own doctor, they have been used for ages and are totally legit. But folks should just talk to their doctor before taking anything.
