What it does
- Soothes and helps calm sensitive or irritated skin.
- Conditions and smooths, supporting a soft, comfortable feel.
- Supports the skin's natural recovery.
How it works
Allantoin is widely documented as a soothing, keratolytic and skin-conditioning agent that promotes a smoother, more comfortable surface and supports the skin's natural repair. It is extremely gentle, which is why it appears across sensitive-skin, baby and after-sun products.
Use level
- Typical use level
- typically 0.1–2%
Commonly used at 0.1–2%. Its water solubility is limited (around 0.5%), so higher levels need careful formulation to avoid recrystallisation.
Formulation considerations
- Limited water solubility (about 0.5%); above this it can recrystallise.
- Add to the water phase with adequate heat/dissolution.
- Stable around pH 4–8 and broadly compatible.
What it pairs with & what to avoid
Pairs well with
- Panthenol, centella, colloidal oatmeal (soothing)
- Most hydrating and barrier actives
Use with care / avoid
- Overloading beyond its solubility limit (crystallisation)
Regulatory status
Allantoin is listed in the EU CosIng database and is a long-established, gentle cosmetic ingredient.
Common questions
What does allantoin do for skin?
It soothes, conditions and smooths, supporting comfort and recovery; it is very gentle.
What percentage of allantoin is used?
Typically 0.1–2%, keeping in mind its limited water solubility (around 0.5%).
Is allantoin safe for sensitive skin?
Yes; it is widely used in sensitive-skin, baby and after-sun products.