Medicube PDRN Pink Peptide Serum is formulated with 10,000 ppm of Salmon PDRN, a powerful ingredient similar to human skin that helps improve skin elasticity and firmness within two weeks. Key Benefits Improves Skin Elasticity: 10,000 ppm Salmon PDRN promotes skin elasticity and helps firm the skin. Toning & Repair: The toning repair system enhances elasticity and helps erase blemishes for smoother skin. Calming & Strengthening: Ocimum Tenuiflorum, Hyaluronic Acid, and Salmon Collagen Complex provide immediate calming and deeply hydrate the skin while restoring the collagen and skin barrier. Suitable for Sensitive Skin: Hypoallergenic and safe for sensitive skin. How to Use After applying toner, take a moderate amount of serum and apply it to the entire face. Gently pat to help with better absorption.