A water-loving humectant that helps skin feel softer, smoother, and comfortably hydrated.
Humectant
What it is
Glycerin, also called glycerol, is a small, water-soluble humectant used throughout skincare. It attracts and holds water within the outer layers of skin. The concentration, surrounding ingredients, and water balance of the complete formula all influence how it feels and performs.
Common uses and benefits
Glycerin is used in cleansers, essences, serums, creams, masks, and body care to increase surface hydration and soften a dry or rough feel. Better hydration can temporarily make skin look smoother and more supple; it does not permanently fill lines or replace the skin barrier.
Who may like it
It can suit nearly every skin type, especially skin that feels dry, dehydrated, tight, or flaky. Oily and blemish-prone skin may also enjoy it in lightweight, non-greasy formulas.
Common formats
Glycerin
Glycerol
Pairing and use notes
It layers easily with hyaluronic acid, panthenol, niacinamide, ceramides, squalane, and shea butter. Pairing humectants with a moisturizer or other emollient step can help make the hydration feel more lasting.
Good to know
Glycerin is generally well tolerated, but any complete product can sting or irritate sensitive skin. Very concentrated humectant formulas may also feel tacky. Patch-test if your skin is reactive and stop if persistent irritation develops.
Sources and references
Albèr et al. (2014), double-blind randomized controlled study of topical humectants and skin hydration — View source
Batt and Fairhurst (1986), in-vivo study of glycerol and stratum-corneum hydration — View source
