Composition Hyaluronic Acid, Biologique Recherche Specific Oxygenating Complex, Lupine Lipopeptides Indications Yall~O2 Serum is a genuine anti-dehydration shock treatment. It provides the skin with the amount of water it needs for its correct functioning. Its innovative formulation using nanotechnology makes this serum an intensive treatment with immediate effect and long-lasting action. A genuine wrinkle filler, it oxygenates, restructures and comforts the epidermis. Perfectly hydrated, the skin is smoothed. In addition, its base formula, composed of redensifying active ingredients, stimulates and tones the tissues. Especially recommended for aged Skin Instants, and those with deep expression wrinkles. For optimal results, it is recommended to apply it morning and/or night, after the treatment milk and P50 lotion adapted to the Skin Instant. For prematurely aged and severely dehydrated skin, we recommend using it in combination with Émulsion Originelle Régénerante and Fluide Complexe Royal. For mature and fatigued skin, we recommend using it in combination with Crème Dermo-RL and Fluide Sérum Gran Millésime. In both cases, we recommend applying it to the entire neck, décolleté and face, morning and/or evening. For localised areas with expression wrinkles, such as the eye and lip contours, we recommend applying Sérum Yall O2 in the evening and Crème Contour des Yeux Biofixine in the morning.