A system built around Water, Glycerin, Milk Lipids, and Ceramide NP as a Ceramide Liposome targets both immediate hydration and long-term barrier optimization. Water (Aqua) functions as the continuous phase/solvent and supports emulsion formation, ensuring uniform delivery of actives. Glycerin (glycerol) is a hygroscopic triol that binds atmospheric and intra-epidermal water, measurably improving stratum corneum hydration and accelerating barrier recovery after experimental disruption. Ceramide NP (the INCI successor to “Ceramide 3”; chemically N-acyl-phytosphingosine) is structurally analogous to endogenous ceramides that organize with cholesterol and free fatty acids into lamellar bilayers, reducing transepidermal water loss (TEWL) and restoring suppleness. Milk lipids — primarily triglycerides plus a phospholipid/sphingolipid fraction (e.g., phosphatidylcholine and sphingomyelin) and cholesterol — supply an emollient, lipid-replenishing phase that complements ceramides and can modulate barrier-related proteins in preclinical models. Together, this quartet constitutes ceramide liposomes, which supports water binding (glycerin), lipid phase repair (ceramide NP + milk lipids), and cosmetically elegant delivery (water phase emulsions).

In haircare, the same architecture translates to scalp comfort and fiber manageability. Glycerin enhances moisture retention at the fiber surface, improving flexibility when properly balanced within a formula. Ceramides interact with the cuticle’s lipid domains and have been investigated for supporting anagen signaling in dermal papilla models while helping mitigate lipid loss from surfactant exposure at the fiber surface. Milk lipids act as rich conditioners that reduce friction and improve feel thanks to their fatty acid and phospholipid composition, while water enables deposition from rinse-off systems and spreadability in leave-ons. Net effect: smoother cuticles, improved combability, and a scalp-friendly sensorial profile suitable for reparative shampoos, masks, and leave-ins.