What is the main role of sebum on the skin?

Sebum plays a crucial role in maintaining the health and integrity of the skin by creating a protective barrier. This oily substance is produced by sebaceous glands and serves several important functions: it helps to keep the skin moisturized by preventing excessive water loss, and it contributes to the skin's overall hydration. Furthermore, sebum contains antimicrobial properties that help protect against pathogens and prevent infections.

In addition to its hydrating properties, sebum also provides a layer of lubrication, ensuring that the skin remains supple and flexible. This barrier function is essential for protecting the underlying tissues from environmental damage such as pollutants and bacteria.

While sebum does contribute to some aspects of skin health, such as keeping it hydrated, its primary role is to act as a defensive film that safeguards the skin's natural function, making it essential in maintaining overall skin health.