Hypochlorous Acid (HOCl) is a biomimetic skincare ingredient that your body naturally produces as part of its immune defence system. It's created by white blood cells to help control harmful bacteria, calm inflammation, and support the skins natural balance. Because HOCl is skin-native, it's something your skin instinctively recognises on contact. When used in skincare it works with your skin - not against it - making it well suited for senitive, reactive, or compromised skin.