@teashell_philippines: When using this product for the first time, please ensure you build up tolerance first. If you experience any discomfort, please discontinue use immediately! Tip: Always build up tolerance gradually before first use. Due to the high concentration, a slight tingling sensation may occur initially. If strong tingling, redness, or an allergic reaction occurs, please rinse immediately and discontinue use. Skin reactions vary from person to person. HYJ YXAMBJH #TeashellBrighteningSerum #GlowupwithTeashell #TeashellGlassSkinSerum #collagen #SensitiveSkin