Serum T.E.W.L by Biologique Recherche is a lipid replenishing and protecting serum that prevents extreme dehydration of the skin. Skin regains a pleasant sensation of comfort. Helping greatly to reinforce epidermal protection systems, this serum works like a genuine lipidic shield thanks to its formula boasting a wealth of lipid-replenishing, repairing and protective active ingredients. By preserving optimal hydration, the skin is better able to defend itself and to withstand extreme conditions of cold. May also be applied as intense dual therapy after Dermo-RL. Serum T.E.W.L is recommended for skin instants with significant lipid deficiencies or subject to extreme climatic conditions (dry and cold).