The Hair Loss Encyclopedia
outermost skin layer protecting against pathogens and moisture loss
The skin barrier, also known as the epidermal barrier or cutaneous barrier, is the outermost layer of the skin that serves as a protective shield. It prevents the entry of harmful substances, pathogens, and excessive water loss, while also maintaining hydration and overall skin health. This barrier is primarily composed of lipids, proteins, and dead skin cells, and its integrity is crucial for preventing conditions like eczema and infections.