People use it for more than just weight loss. In fact it seems to be very popular with gym bros specifically. I have no experience with any peptides, but I think it’s fascinating that people are willing to inject themselves with gray market chemicals with no long term studies.
I guess they're the long term study subjects themselves at this point. honestly, maybe it's a positive thing? lots of testing across a variety of subjects, without all the ethics and paperwork slowing it down.