“Face oils are tricky,” says Kiran Mian , D.O, a board-certified dermatologist at Hudson Dermatology and Laser Surgery in New York City. One size rarely fits all in skin care and face oils are particularly nuanced. At their most basic, face oils are hydrators with both emollient and occlusive properties (meaning they help repair the skin barrier and lock in moisture), says Hadley King , M.D., board-certified dermatologist in New York City. But they can do so much more than moisturize . “Face