Imagine how awesome it would be to have a dermatologist for a parentโ€”someone you could talk to or text, day or night, about all things skin. Well, it turns out, dermsโ€™ kids are no different than anyone else when on the receiving end of advice from their parents: โ€œMy daughterโ€™s eyes kind of glazed over the first time I started telling her what to do about her acne; I had to remind her that people pay me for my opinion,โ€ laughs Peterson Pierre, M.D., a dermatologist in Thousand Oaks, California who has a daughter, 20, and son, 18. โ€œBut once she got that the advice was coming from a dermatologist, not โ€˜dad,โ€™ she started following it.โ€

To give you the best of both worldsโ€”the expert, insider advice without the parental opinion or commentary baked-inโ€”we asked four skin gurus-slash-guardians about the most important wisdom theyโ€™ve handed down to their teens and 20-somethings.