Stratum corneum hydration enhancement

Stratum corneum hydration enhancement refers to interventions and ingredients intended to improve or maintain the water content of the stratum corneum, the skin's outermost, barrier-forming layer composed of corneocytes embedded in a multilamellar lipid matrix. The hydration state of the stratum corneum is critical for skin flexibility, barrier function, and enzymatic processes such as corneocyte shedding (desquamation). Hydration is achieved via several mechanisms: retention of water by intralamellar lipids, accumulation of natural moisturizing factor inside corneocytes, and water-transport proteins such as aquaporin-3. Common strategies to enhance stratum corneum hydration include topical application of humectants (e.g., glycerol, urea, hyaluronan, niacinamide), improving lipid barrier quality, and reducing transepidermal water loss. Various skin diseases, such as eczema and atopic dermatitis, are characterized by impaired stratum corneum hydration and benefit from these interventions.\n\n"Stratum corneum hydration enhancement" is not a molecular target but a physiological endpoint; it is not appropriate to treat it as a receptor, enzyme, or similar molecular entity. Instead, it describes an outcome relevant to dermatology, achieved through diverse molecular pathways and agents.

Other names

Enhanced stratum corneum hydrationIncreasing stratum corneum hydrationSkin hydration

Attract and retain water in the stratum corneum (humectant mechanism); Enhance lipid organization to reduce water loss; Modulate keratin or natural moisturizing factor (NMF) content