Your lip sunscreen should contain two types of moisturizing ingredients, known as humectants (think: hyaluronic acid, glycerin, aloe vera) and emollients (petrolatum, coconut oil, shea butter), says New York-based board-certified dermatologist Hadley King, M.D. Humectants draw moisture into the top layers of your lips, and emollients lock the moisture into place—without emollients, the moisture will evaporate and your lips will be left drier than they were before.
Additionally, Dr. Harth says that the best sunscreen ingredients are octinoxate, octisalate, and avobenzone, boasting multiple advantages: “They’re invisible, stay more on the skin and lips, and won’t clog pores—an advantage for people with adult acne around the mouth and on the chin,” he says.
Read the full article here