Skin tissue hydration

Skin tissue hydration refers to the level and state of water content within the skin, predominantly within the stratum corneum, the outermost layer, and the underlying dermis. It is not controlled by a single molecular target, but is regulated by the interplay among natural moisturizing factors (NMFs), intercellular lipids (ceramides, cholesterol, fatty acids), proteins like filaggrin, membrane transporters (notably aquaporin-3), hyaluronan (hyaluronic acid), and tight junctions. Skin hydration affects barrier integrity, flexibility, epidermal turnover, cosmetic appearance, and the ability to withstand environmental insults. Drugs and cosmetics aim to improve hydration by increasing water-binding substances, enhancing barrier function, or reducing water loss, but do not act via a defined, single receptor or enzyme. "Skin tissue hydration" as phrased is descriptive of a state or property—not a molecular/therapeutic target. If information on specific targets involved in skin hydration (such as "Aquaporin-3", "Filaggrin", "Hyaluronan") is desired, those should be queried individually.

Other names

Skin hydrationSkin water retentionCutaneous hydration

Null (topical agents increase water retention by acting on multiple factors: increasing humectant concentration, reducing transepidermal water loss, supporting barrier lipids)