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Glycerin

Glycerin

Summary: A powerful, skin-compatible humectant that hydrates, protects the barrier, and suits even the most sensitive skin.

Published on: 30/03/2025

Glycerin (also known as glycerol) is a naturally occurring trihydroxy alcohol (C₃H₈O₃) derived from plant oils or animal fats. Clear, odorless, and viscous, glycerin is widely used in skincare for its powerful moisturizing effects. Its primary cosmetic function is as a humectant, meaning it draws water into the outermost layer of the skin to support hydration and barrier function.

Skin Benefits

Hydration and Moisture Retention

Glycerin is one of the most effective humectants available in skincare. It binds water from the environment and deeper skin layers to the stratum corneum, improving skin hydration, softness, and plumpness. A 2016 review identified glycerin as outperforming other common humectants like urea and hyaluronic acid in terms of efficacy [1].

Enhancement of Skin Barrier Function

By maintaining optimal moisture levels in the outer skin layer, glycerin supports the integrity of the skin barrier. This reduces transepidermal water loss (TEWL) and improves resistance to irritants and environmental stressors [2].

Wound Healing and Protective Effects

Glycerin has been shown to contribute to skin healing and soothe irritations. Its hydrating and barrier-protecting properties make it beneficial for individuals with dry, sensitive, or inflamed skin, including those with eczema or psoriasis [1] [2].

Safety Profile

Glycerin has an excellent safety profile and is considered non-toxic, non-comedogenic, and non-irritating. It is well tolerated across all skin types, including sensitive and acne-prone skin. It is one of the most universally accepted and skin-compatible ingredients used in cosmetics.

References

  1. Sethi, A., Kaur, T., Malhotra, S. K., & Gambhir, M. L. (2016). Moisturizers: The Slippery Road. Indian Journal of Dermatology, 61(3), 279–287. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4885180/

  2. Fluhr, J. W., Darlenski, R., & Surber, C. (2008). Glycerol and the skin: holistic approach to its origin and functions. British Journal of Dermatology, 159(1), 23–34.
    https://pubmed.ncbi.nlm.nih.gov/18510666