húðbarrierinnar

Húðbarrierinnar, often referred to as the skin barrier, is the outermost layer of the skin, primarily the stratum corneum. This crucial protective layer acts as a physical and biological shield, preventing the entry of harmful microorganisms, allergens, and irritants into the body. It also plays a vital role in retaining moisture, preventing transepidermal water loss (TEWL) and maintaining skin hydration.

The effectiveness of the skin barrier is dependent on its complex structure, which includes corneocytes, the dead skin cells, embedded within a lipid matrix. This lipid matrix, composed of ceramides, cholesterol, and fatty acids, is essential for maintaining the barrier's integrity. When this barrier is compromised, it can lead to various skin concerns such as dryness, sensitivity, redness, and an increased susceptibility to infections and inflammatory conditions like eczema and acne. Factors such as harsh cleansing products, environmental stressors, and certain medical conditions can all impair barrier function. Maintaining a healthy skin barrier is therefore a fundamental aspect of skin health and requires a gentle approach to skincare.