For the vast majority of people “peptides” is a new word and they assume it’s new science that does something new. It’s like if they had never before heard the term “pill” or “injection” and now someone is marketing it to them. So you have a enthusiastic family member going “omg, I got this amazing injection, it can cure cancer, make you look like the rock, cure baldness and fill your bank account all at the same time!” And you go “I doubt that” and they’ll refer you to all the amazing science on injecting things and how injections are used broadly in the health industry and can treat so many different things. And they are not exactly wrong in that connection, they are just dumb, and of cause a given injection being able to treat diabetes says nothing about injections in general and absolutely nothing about cheap foreign snake oil injections.
I have the same feeling about the whole discussion. I know that colloquially we use terms like "protein" to refer to dietary protein rather than the class of mollecules.
But the way "peptide" is used by all the bro/gal-science influencers that push them online makes it blatantly obvious that they have next to no idea what they're talking about.
