Ceramides, natural waxy lipids in the stratum corneum, are crucial for the skin’s lipid barrier function. Applied topically, ceramides enhance hydration and barrier performance. They bind skin cells in the upper layer, creating a protective layer that retains moisture and adds plumpness. This “brick-and-mortar” analogy showcases their role – skin cells as bricks, ceramides as mortar. Ceramides replenish moisture, strengthen the skin’s natural barrier, and shield it from external harm.