La Roche-Posay Hyalu B5 Serum is an advanced skincare treatment that combines hyaluronic acid and vitamin B5 to provide intense hydration and anti-aging benefits. This lightweight, fast-absorbing formula helps plump skin, reduce fine lines, and restore skin's natural moisture barrier. This dermatologically-tested serum is suitable for all skin types, including sensitive skin. The formula contains two types of hyaluronic acid that work at different skin depths to provide optimal hydration and skin plumping effects. For best results, apply morning and evening to clean skin before moisturizer. The 30ml size makes it convenient for daily use while being travel-friendly.