Joshua Zeichner, MDDr Joshua Zeichner is an Associate Professor and the Director of Cosmetic and Clinical Research in Dermatology at Mount Sinai Hospital in New York City. He is one of the country’s key opinion leaders in acne and rosacea and is an expert in cosmeceuticals and skincare. Dr Zeichner trains residents and medical students, regularly lectures to international audiences at the major Dermatology meetings and has published his work in the most respected peer-reviewed journals. He is frequently called on by the media for his expert opinion, and he can be found quoted in national magazines and newspapers. Dr Zeichner is consistently voted by his peers to New York Magazine’s Best Doctors list and New York City Super Doctors published annually in The New York Times Magazine.