What is the protective barrier of lipids and secretions on the skin's surface called?

The protective barrier of lipids and secretions on the skin's surface is known as the acid mantle. This is a thin, protective film that is created by the secretion of sebum (an oily substance) and sweat. The acid mantle plays a crucial role in maintaining the skin's health by providing an acidic environment that helps protect against pathogens and harmful microorganisms. This acidity also aids in maintaining the integrity of the skin's microbiome, which consists of beneficial bacteria that help to fend off disease-causing agents.

The acid mantle also serves to prevent moisture loss from the skin, contributing to its overall hydration and barrier function. As a result, the skin remains supple and resilient against external irritants and environmental stressors. The importance of the acid mantle in skin health highlights its role in both protection and maintaining proper skin function.