Chapter 1: Skin barrier, frontline to protect your skin Have you ever felt that your skin has become dry and sensitive, or that your wrinkles appear to have increased significantly? One of the causes of all these problems may be the weakening of the skin barrier. What is a skin barrier? Simply put, think of it as a thin protective film on the outermost layer of our skin. Just like a solid wall stacked tightly with bricks and cement, skin cells (bricks) and lipids (cement) work together to protect our body from external harmful substances and prevent the moisture inside from evaporating. When this skin barrier is strong, the skin is moist and healthy, and it is not easily shaken by external stimuli. However, when the barrier weakens, external bacteria, fine dust, and ultraviolet rays easily penetrate like a perforated wall, and the moisture in the skin rapidly evaporates, leading to dryness, decreased elasticity, and wrinkles. Surprisingly, the health of this important skin ...
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