Dr. Kauvar discusses her preferred anti-aging products with Today.com on “18 anti-aging products dermatologists actually use themselves.” “Sunscreen is the most important anti-aging product because the sun is responsible for 90 percent of skin aging. This is my favorite face sunscreen because it doesn’t irritate even the most sensitive skin — we even use it on patients after laser procedures. It’s water-resistant and adds a light tint to your skin, which is great for when you want to go sans makeup. I apply it after my moisturizer and before my makeup. Just be sure to reapply if you’re outdoors all day, ,” says dermatologist Arielle N.B. Kauvar, M.D., a New York City-based dermatologist and clinical professor of dermatology at Langone NYU Medical Center.