Hyaluronic acid (Sodium Hyaluronate 4,000ppm) supplies moist and forms moisturizing layer on skin. Allows moist and soft skin. “Pulling inside is a bigger problem than pulling externally.” Hyaluronic Acid Hydra Power Essence is a daily power essence that nourishes deeper inside the skin and fills there with water. A natural moisture-retention ingredient, Sodium Hyaluronate is formulated at 4,000ppm to moist the dry rough skin and to endow smooth skin texture.