Casey Gallagher, MD, is a dermatologist and clinical professor in the Department of Dermatology at the University of Colorado Denver. Acne is a common skin condition that affects about 50 million ...
If you deal with acne, odds are that you think twice before applying anything new on your skin — forbid the wrong serum, moisturizer, or makeup primer causes a flare up. Sunscreen is a non-negotiable ...
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