Eau Brilliant Serum is a concentrated treatment that intensely hydrates and reveals an instant radiance (the "Glass Skin" effect). Enriched with Trehalose, a natural sugar, it helps the skin retain moisture. Cerasome+, a complex of encapsulated ceramides, strengthens the skin barrier. A blend of natural oils (mandarin, camellia, broccoli) nourishes and illuminates the skin for a smooth, silky finish.