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How is the skin's barrier function supported?

Ceramide is one of the most important factors in our skin’s barrier function.
One of the characteristics of Ceramide is that it can bind itself with water molecules despite the fact that it is a type of lipid. By nature, water will freeze when the temperature reaches 0 degree. However, our bodies won’t freeze even when we go to places where the temperature is minus 40 degrees. That is because Ceramide in our stratum corneum is able to hold water molecules.
While various components such as amino acids are capable of maintaining skin moisture, it is ceramide that is able to maintain water in its liquid state in the body, even under extremely cold temperatures. When we do not have sufficient ceramide, our skin is unable to retain water effectively. Water evaporates easily and skin becomes dry.
Therefore, Ceramide is essential to skin's barrier function.