What is Skin Barrier?

"Establishing the skin barrier" is a common skincare topic. So, what exactly is the skin barrier? Do you truly understand the structure of our skin? Here's a guide to understanding the skin barrier, covering aspects like physical, chemical, immune, and biological barriers. The skin, being the body's first line of defense, has its outermost layer known as the skin barrier. This barrier is divided into several aspects in dermatology: physical, chemical, immune, and biological. When we talk about the skin barrier in everyday terms, we usually refer to the physical barrier. Physical Barrier: Composed of sebum film, stratum corneum proteins, lipids, and dermal glycosaminoglycans, the healthy stratum corneum forms a stable "brick wall structure" with lipid layers arranged like mortar between cells. The integrity of both "bricks" (corneocytes) and "mortar" (intercellular lipids) ensures the completeness of the skin barrier. The physical barrier primarily functions in moisturizing, regulating inflammation, and defending against external threats like harmful substances, irritants, and sunlight. Chemical Barrier: The skin surface has a layer of sebum and sweat secreted by sebaceous and sweat glands, creating a weakly acidic environment known as the chemical barrier – the skin's acid mantle. This protects against external influences during the process of stratum corneum shedding, where intercellular proteins break down into intercellular matrix. Biological Barrier: Various bacterial colonies inhabit the skin surface, forming the "biological barrier" or "microbial barrier." These microorganisms, essential for the body, thrive on the intact acidic protection provided by the acid mantle. Immune Barrier: Immunity comprises active and passive immunity. Passive immunity relies on the entire epidermal structure, mainly composed of corneocytes, acting as a passive defense – the barrier protection. Active immunity involves almost all cells in the epidermis, such as corneocytes, Langerhans cells, lymphocytes, and cytokines, acting as active defense. In summary, the skin barrier equals physical + chemical + biological + immune barriers. These four barriers interact daily, affecting the entire body in a delicate balance while demonstrating remarkable adaptability. To maintain healthy skin, it's crucial to avoid excessive cleansing, over-exfoliation, and skin damage. Additionally, proper sun protection and minimizing exposure to dust and UV radiation are essential. If you have any suggestions regarding the skin barrier, feel free to share your thoughts with us! #skincare #beauty tips #eye mask #eye patch #eye cream #viicode eye mask#viicode eye patch#anti aging #ESS #eastsuperstar VIIcode blog: https://viiblog.com/index.php?route=blog/category&blog_category_id=3 VIIgarden:https://us.viigarden.com/

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