What Is Hyaluronic Acid? Hyaluronic Acid (HA) is a water-binding molecule found naturally in the skin, eyes, and joints. It acts like a sponge, holding up to 1,000 times its weight in water. In skincare, it is used to hydrate the skin, repair the barrier, and improve overall texture. It is commonly found in: HA … Continue reading HYALURONIC ACID (Ingredient Guide)