“Vitamin C is an excellent antioxidant that helps quench free radicals that develop in the skin from sun damage,” says New York dermatologist Bruce Katz, MD. “It also helps with collagen building and reduces damage to cells so skin will be healthier and age less rapidly.” There are many formulas out there with age-fighting ingredients, but look for one with L-ascorbic acid (the most natural form), which penetrates skin better. Katz recommends applying a serum after sunscreen (yes, after) in the morning as it augments the benefits of sun protection.
