Going from cold, windy air outside to dry heat inside sucks the moisture out of your skin, says N.Y.C. facial plastic surgeon Jennifer Levine, who suggests switching to a heavier moisturizer in the winter (try Olay Definity Night Restorative cream, $25; target.com
). If you're acne prone, look for an oil-free formula (like Philosophy When Hope Is Not Enough hyaluronic acid–peptide capsules, $50; philosophy.com
) loaded with water-binding hyaluronic acid.