Bioderma Hydrabio Serum 40ml. Instant and long-lasting moisturising concentrate.. Moisturises instantly and lastingly. Smoothes the skin and restores radiance. Very good tolerance - Non-comedogenic - Smooth, extra-fresh texture - Excellent make-up base. Hydrabio Sérum refills the skin’s daily water needs for its immediate hydration and relaunches the skin’s natural rehydration mechanisms for long-lasting results. It combines the AquageniumTM patent and powerful hydrating active ingredients (Hyaluronic Acid, Xylitol & Glycerin) to stimulate 3 mechanisms of hydration. It brings the water to the skin, maintains it in-depth and makes it circulate by stimulating the production of water channels in the skin called aquaporins.