Dr. Ellen Gendler on Instagram: "“Dr.” Barbara Sturm has built an expensive skincare brand based on being a “doctor,” but nobody knows what her “medical training” actually is. It’s not dermatology, that’s for sure. Exosomes are a fascinating concept and probably will become much more important in the field of dermatology in the coming years. But right now, there is very little (or no) evidence that topical exosomes will do much of anything for you except deplete your wallet. AND IT IS ILLEGAL TO