The COSRX Hyaluronic Acid 3 Serum is formulated with low-molecular Hyaluronic Acid for maximum moisture absorption, providing intense hydration and skin barrier protection. Formulated with 3% Hyaluronic Acid and Amino Acids, it plumps the skin and gives a 'glass skin' finish. Additionally, it contains Ceramide NP to strengthen the skin barrier and lock in the moisture of the serum, as well as Lactic Acid for gentle exfoliation and a healthy complexion.