What is sebum?

Sebum is a substance produced by sebaceous glands in the skin, primarily composed of a mixture of oily substances and fragmented cells. This oily secretion plays a crucial role in maintaining skin health by providing moisture and creating a protective barrier against external elements. It helps to keep hair and skin lubricated, preventing dryness and potential damage.

Sebum also has antimicrobial properties, which can protect the skin from infections. The composition of sebum includes triglycerides, free fatty acids, wax esters, squalene, and cholesterol, which are essential for skin hydration and functionality. Understanding the nature of sebum is vital in contexts such as dermatology and skincare, as an imbalance in sebum production can lead to various skin conditions, including acne.