If skin is too oily, skip moisturizer altogether in the morning─but never leave home without applying sunblock. It probably seems counterintuitive, but a healthy dose of sunblock is an essential part of controlling oil. Research shows that exposure to UV light pulls water from the skin while increasing the size of sebaceous glands and stimulating oil production. Mineral-based sunblocks rich in zinc and titanium oxide protect against both UVA and UVB rays and have the additional benefit of absorbing oil.
Apply sunblock directly to bare skin so it absorbs properly, and remember that quantity is important: “SPFs are tested in very controlled amounts, so if you’re not applying enough, you won’t get the full benefit,” says Doris Day, assistant clinical professor of dermatology at New York University, who advises patients to use a teaspoon of sunblock on the face. If you feel greasy, you can top the sunscreen with a mattifying primer that is silicone-based. (Try SMASHBOX Photo Finish Primer or LANCOME oil-free La Base Pro Perfecting Primer).