From what I've seen, this has nothing to do with medical advice - it's lifestyle advertising driven by the fact that these are popular/attractive/respected 24-y

From what I've seen, this has nothing to do with medical advice - it's lifestyle advertising driven by the fact that these are popular/attractive/respected 24-year oldswith a big built-in social network of other high achieving young people. My wife is a recent med school graduate, so I have some exposure to this from seeing her IG timeline. She was also explicitly recruited by one of her more shameless influencer friends to try to make some side cash with some scheme.