What does the term "sebum" refer to?

Sebum refers specifically to the oily substance that is produced and secreted by the sebaceous glands in the skin. This natural oil plays a critical role in maintaining the skin's health by providing a barrier that helps to keep moisture in, as well as protecting the skin from external factors. Sebum has antibacterial properties, which can help prevent infections and contribute to a healthy complexion.

Other terms may relate to different aspects of skin care and function; for instance, the waxy film that protects the skin from moisture describes a barrier, but it is not the definition of sebum. Exfoliants are substances used to remove dead skin cells, and proteins in the skin, such as collagen, contribute to firmness but are not sebum either. Understanding the role of sebum is vital for recognizing its importance in skincare routines, especially for conditions like acne and dry skin.