La Roche-Posay Hyalu B5 Pure Hyaluronic Acid Serum works by flooding your skin with intense hydration. Hyaluronic acid acts like a moisture magnet, drawing water deep into the dermis where it matters most.

Paired with vitamin B5, which strengthens your skin barrier, this serum doesn't just add water, it helps your skin hold onto it.

The lightweight gel texture absorbs instantly, leaving no greasy residue. Fine lines soften as your skin becomes visibly plumper.