Glycerin, also known as glycerol, is a water-soluble polyol naturally present in human skin. It is one of the most widely studied and used humectants in cosmetics, recognized for its ability to attract and retain water molecules. In scientific literature, glycerin is associated with skin hydration through two documented complementary mechanisms. On one hand, it attracts water molecules from the environment to the skin's surface layers. On the other hand, it is documented to form a film on the skin surface that helps limit transepidermal water loss and preserve hydration comfort. These documented humectant properties are linked, according to available data, to visible improvement in skin texture, reduction in the appearance of dehydration fine lines, and softer, more comfortable skin appearance. Glycerin also supports skin comfort against external factors such as cold, wind, and climate variations. Its role in maintaining the hydrolipidic film makes it a reference active in cosmetics, for both face and body skincare. Its tolerance is excellent and documented: glycerin is suitable for all skin types, including sensitive, reactive, or compromised skin. Its documented soothing properties help reduce discomfort sensations and improve comfort for redness-prone skin.
In summary, a fundamental humectant active, widely studied and documented, linked to skin hydration support, visible skin suppleness, and daily skin comfort.
