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In honor of National Skin Barrier Day on Thursday, March 12, we're diving deep into this mysterious term. What is the skin barrier? What does it do, and what do people mean when they say they damaged it? How can you repair your skin barrier? We'll tackle all these questions and more below! What is the skin barrier? You may know that your skin is made up of layers . According to Heathline, " The outermost layer is called the stratum corneum . Some people describe this as a 'br