YDRA N°1 SERUM is a creamy and quenching gel that nourishes very dry and dehydrated skins thanks to actives such as imperata cylindrica, aloe vera and vegetal glycerin. According to your skin type you may use it with CREME HYDRA N°1 or HYDRA N°1 FLUIDE for immediate and prolonged hydration :
- With HYDRA N°1 Crème, the skin hydration (measured by corneometry) is increased signifantly increased with an average of 114 % after 1 hour and 102 % 8 hours after application (a).
- With HYDRA N°1 (fluide),the skin hydration (measured by corneometry) is increased signifantly increased with an average of 122 % after 1 hour and 76 % 8 hours after application (b).
Quickly absorbed, this gel allows the skin to replenish its inner moisture. 
Restructuring and redensifying hyaluronic acid and silicon are combined with vitamins A, C and E for their antioxidant and smoothing properties.