Humectants (etc hyaluronic acid) sticks with water through hydrogen bonds which works through a short distance. They do stick to water but water is already evaporating out if your skin. Plus, most serums have 80% water which is enough for humectants to grab onto #korean #koreanskincare #skincare #kbeauty #toronto #aesthetic #popularkoreanskincare #fyp #glassskin #acne #asian #viet