Transepidermal Water Loss (TEWL) refers to the natural process of water evaporation from the skin’s outermost layer, the epidermis, into the surrounding environment. It is a crucial mechanism for maintaining skin hydration and regulating body temperature.
TEWL can be influenced by various factors, including environmental conditions, skin health, and skincare practices. High TEWL levels may indicate skin dryness or a compromised skin barrier, while low TEWL levels suggest better skin hydration and integrity.
Measuring TEWL is a valuable tool in dermatology and skincare research to assess skin barrier function and moisture retention.