You've probably heard that retinol creams will make you more likely to burn in the sun, and that you should only apply them at night. According to recent research, that's actually not true.
"Clinical studies have shown pretty definitively that retinoids do not lower the MED— or minimal erythemal dose — of human skin, which is the amount of UV light you can take before the skin burns," professor of dermatology Dana Sachs told Allure.
Sachs says that the myth arose due to participants in early retinoid studies reporting skin redness after spending time in the sun. However, the redness was likely due to heat exposure rather than sunburn.
Though you may not be inviting an instant burn if you use retinol during the day, there are benefits to applying retinol at night.
"Stem cells in the epidermis (the outer layer of skin) reproduce mainly at night and they're responsible for creating new skin cells, which replace the old ones and reduce the appearance of ageing," clinical director for HC MedSpa Rabbia Aslam told The Telegraph.
Since retinol mimics this process, Aslam recommends letting the product enhance your skin's efforts while you sleep.
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