Ceramide Precursors (Sphingolipids)

Ceramide precursors — sphingosine, phytosphingosine, and related sphingoid bases — are the raw materials from which skin cells construct their own ceramides. Supplying them topically supports endogenous barrier lipid synthesis rather than simply adding finished ceramides, a build-it-yourself approach that suits chronically dry and atopic skin. At 0.1–0.5% they integrate into lamellar creams and pair logically with niacinamide, which upregulates the same synthetic pathway. Over weeks, skin rebuilds its own waterproofing — the most sustainable form of barrier repair.