We all want to look our best, but for celebrities it’s part of the job. That might be why stars are famous (and sometimes infamous) for trying unconventional beauty hacks in their quest for ageless skin and healthy hair.

But is Sandra Bullock and Cate Blanchett’s “penis facial” actually effective? What about Blake Lively’s homemade mayonnaise mask? We asked board-certified dermatologist Dr. Harold Lancer and¬†celebrity¬†hairstylist Ted Gibson to set the record straight on which beauty treatments are hype and which really do work.