What it does
- Draws and holds water in the upper skin layers for lasting hydration.
- Supports the skin barrier and improves suppleness.
- Improves the sensory feel and stability of many formulas.
How it works
Glycerin is a gold-standard humectant. It attracts water and, importantly, is widely documented to help normalise the skin's own moisture handling and support barrier function, not just sit on the surface. Its small size lets it integrate into the stratum corneum.
Use level
- Typical use level
- typically 2–10%
Extremely versatile, commonly 2–10%. Around 3–5% is a typical comfortable level; higher levels increase hydration but can feel sticky, which is often offset with emollients.
Formulation considerations
- Fully water-miscible; add to the water phase.
- Stable and compatible across essentially all cosmetic systems and pH.
- High levels can feel tacky; balance with emollients or other humectants.
- Also aids freeze-thaw stability and acts as a mild solvent.
What it pairs with & what to avoid
Pairs well with
- Hyaluronic acid and other humectants
- Occlusives and emollients (to seal)
- Essentially all actives
Use with care / avoid
- Very high levels alone (sticky feel)
Regulatory status
Glycerin is listed in the EU CosIng database and is one of the most established, universally accepted cosmetic ingredients.
Common questions
What percentage of glycerin is used in skincare?
Commonly 2–10%, with about 3–5% a typical comfortable level.
Is glycerin good for the skin barrier?
Yes; it is widely documented to hydrate and support healthy barrier function, which is why it appears in so many moisturisers.
Why does glycerin feel sticky?
At high levels its humectancy can feel tacky. Balancing with emollients or other humectants improves the finish.