Ceramides are naturally occurring lipids found in the skin's outermost layer, the stratum corneum, and are crucial for maintaining its moisture barrier and overall health. It helps to replenish and strengthen the skin's barrier function, which can become compromised due to factors like aging, environmental damage, or harsh skincare products. By restoring ceramides to the skin, these products can enhance hydration, reduce moisture loss, and improve the overall texture and resilience of the complexion.