Uriage H.A. Booster Serum 30 ML: This H.A booster serum containing 1.5% Pure and Natural Hyaluronic Acid acts on signs of dehydration (fine lines, discomfort, dull complexion, etc.). Its comfortable and ultra-light texture melts on the skin to restore the natural mechanisms of hydration. Key Components Hyaluronic Acid Marshmallow Flower Extract Indication Skin hydration How to use Apply 2 to 3 drops before your Water Cream. Avoid contact with eyes.