COLLECTION: Biology / This unique and innovative 3-in-1 serum, combining dermatological expertise and organic certification, offers a complete solution for the face. Its fresh, non-sticky gel texture hydrates in just 1 minute¹, plumping and strengthening fragile skin thanks to powerful active ingredients: Rhealba® Organic Oat Sap : Rebalancing and moisturizing properties. Gold Florin Extract : Known for its anti-pollution properties. Concentrated Hyaluronic Acid : Long-lasting hydration. Features : Tested on allergic skin. No perfume or essential oil. Non-comedogenic. 99% natural origin formula with only 9 essential ingredients for optimal tolerance. How to use Biology 3-in-1 Serum + Free Micellar Water - 30ml Depending on your skin's needs, BIOLOGY HYALU 3-in-1 serum can be mixed with your daily cream for a customized treatment, applicable to the face, neck, and eye area. Perfectly hydrated and protected, the skin is more supple and plump, and the complexion is radiant from the morning.