The skin barrier is the outermost layer of the skin. Skin consists of three layers: the epidermis, the dermis, and the hypodermis, per Cleveland Clinic. The epidermis is the top layer of skin, and the ...

Phrases like "skin barrier," "moisture barrier," and "barrier function" are commonly used in skincare. Your skin's barrier function is twofold: First, it needs to trap moisture inside the layers of ...