Don't consider your morning routine over until you've applied sunscreen. "External protection is the most important element for healthy skin," Somerville says. "If you don't protect your skin, then the issues you fix will come right back again." Sunscreens with either physical or chemical blocks will protect you, but make sure to look for a formula with broad-spectrum protection.
And what if your makeup has an SPF? "If it's an SPF of 15 or higher, that should be enough coverage for your average day, as long as you evenly apply it all over your skin," Somerville explains. "However, keep in mind that you're probably not applying this foundation on your neck, chest and hands, so make sure to apply sunscreen to those areas to ensure the best protection."