What is the role of ceramides in the epidermis?

Ceramides play a crucial role in maintaining the structure and function of the outermost layer of the skin, known as the epidermis. They are lipid molecules that contribute to the skin's barrier function by filling the spaces between skin cells, effectively acting as a "glue." This cellular glue helps to keep skin cells tightly packed together, which in turn prevents moisture loss and protects against environmental aggressors.

The ability of ceramides to maintain the integrity of the skin barrier is vital because a well-functioning barrier not only supports hydration but also helps in protecting the skin from pathogens and irritants. While ceramides can also play a supporting role in hydration and protection, their primary function is this structural stability that augments the skin's overall health and resilience.