Kiehl's Apothecary Preparations Skin Strengthening Concentrate is a lightweight facial concentrate formulated to support the skin’s lipid barrier and improve surface hydration. Its base is rich in squalane, a highly refined botanical lipid known for quick absorption and non-greasy emollient properties, and a botanical lipid complex designed to reinforce skin lipids. Key features include barrier support, long-lasting emollience, and compatibility with targeted serums and treatments. Benefits include immediate smoothing and softening of skin texture, improved resilience against moisture loss, and enhanced comfort for skin prone to tightness or transient dryness. Recommended usage is to apply a few drops to clean skin on the face and neck, gently massaging until absorbed; it can be used alone as a hydrating oil-step or combined with a targeted serum as part of a bespoke routine. Suitability: formulated for normal to dry or lipid-compromised skin types and for those seeking barrier restoration and hydration; individuals with oily or acne-prone skin should patch-test first. Contains squalane and a skin lipid blend; check full ingredient list for allergens or sensitivities. Strengthens and fortifies the skin barrier to improve resilience and reduce visible signs of aging. Contains 35% squalane plus skin lipid complex to replenish lipids, strengthen barrier and boost hydration. Suitable for all skin types; strengthens the skin barrier and improves resilience. Lightweight, silky serum that spreads easily and absorbs quickly without greasy residue. Helps strengthen skin barrier and boost hydration with squalane and lipid complex. important information This product is for external use only