Seal vulnerable skin inside an epidermal shield with Biologique Recherche Sérum T.E.W.L., an ultra-concentrated oil serum that helps stop moisture from escaping in cold, dry or demanding climates.A precious blend of replenishing plant oils compensates for lipid deficiencies and strengthens the hydrolipidic film, allowing the epidermis to maintain optimal hydration. Just a few drops bring immediate comfort to tight, severely dehydrated skin and soften the look of fine lines linked to moisture loss.Key Benefits:✓ Helps prevent transepidermal water loss ✓ Replenishes lipids and restores a stronger protective barrier ✓ Provides intense nourishment and immediate comfort ✓ Softens tightness and fine lines associated with dehydrationKey Ingredients: Sesame, Macadamia & Camellia Oils: Provide rich, skin-compatible lipids for barrier repair. Cranberry, Sea Buckthorn & Raspberry Oils: Supply omega fatty acids and antioxidant protection. Luffa & Jojoba Oils: Help reconstruct the lipid film and maintain suppleness. Salicornia & Undaria Extracts: Support hydration and resilience in dry environments. Available sizes: 8 mL / 0.27 fl oz and 30 mL / 1.0 fl oz