What is tretinoin? As New York City-based dermatologist Hadley King, describes it, tretinoin is a prescribed topical treatment medication and one of the most potent forms of retinoids that can be used ...

What do doctors have to say about tretinoin and retinol, their benefits, and side effects? These are their expert recommendations. Lara Vukelich is a freelance writer in San Diego, California. She ...