This smoothing blend of ingredients provides deep, long-lasting hydration on three levels: on the surface, deeper in the skin and by increasing the skin’s own hyaluronic acid production. Instant hydration and smoothing on the surface of the skin Deeper hydration and fine line reduction with the addition of hydrolyzed hyaluronic acid Proprietary blend HA-Pro ComplexTM encourages the skin to create its own hyaluronic acid, resulting in long-term anti-aging and hydration https://www.pcaskin.com/hyaluronic-acid-boosting-serum.html