Ceramides for glowing skin
The primary function of the skin is to create a barrier between the inside and outside of the body, providing protection from the outside environment while keeping inside functional necessities: specifically, water. Like all other organs, human skin undergoes chronological aging. Unlike other organs, the skin is in direct contact with the environment and therefore undergoes the most environmental stress while also being key to outward appearance.
The skin is constituted of three layers: hypodermis, dermis, and epidermis. The water barrier function is ensured by the outer part of epidermis. This barrier is analogous to a brick wall, with the corneocytes acting as the bricks and the lipids as the mortar, the major lipids being: ceramides, cholesterol, and free fatty acids. This barrier permits the retention of water preventing the formation of cracks.