Susan Bard, MD, is a board-certified general and procedural dermatologist with the American Board of Dermatology and a Fellow of the American College of Mohs Surgery. There are five different skin ...

Just as a golden retriever is one type of dog, retinol is one type of retinoid. “Retinoid” is the umbrella term that describes all of the vitamin-A-derived ingredients we see in skin care, inclusive ...