Sounds crazy, but ChapStick and most other lip balms don’t work by adding moisture; instead they seal your kisser to protect it from losing its own moisture. "The wax or petrolatum in lip balm essentially creates a watertight barrier that prevents your internal skin moisture—which normally evaporates through the surface, especially on dry, cold, windy days—from escaping, softening your lips and keeping them feeling moist," says board-certified dermatologist Jessica Krant, M.D.
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The popular lip balm has some surprising secrets!
5 Things You Never Knew About ChapStick