Glycerin
Definition
Glycerin (also called glycerol) is one of the most effective and widely used humectant ingredients in skincare. It is a naturally occurring sugar alcohol that attracts and holds water from both the environment and deeper layers of the skin, pulling moisture into the stratum corneum. Glycerin is colorless, odorless, and has a thick, syrupy texture. It is found in virtually every type of skincare product, from cleansers and serums to moisturizers and masks. Beyond its hydrating ability, glycerin also strengthens the skin barrier, supports the natural desquamation process, and can protect against irritation. It is extremely well-tolerated and rarely causes allergic reactions, making it suitable for all skin types including sensitive skin. At high concentrations it can feel sticky, so it is typically used at 2-5% in formulations alongside other ingredients.
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