Allantoin
Also known as: Comfrey Extract (natural source), 5-Ureidohydantoin
What It Is
A naturally occurring compound (also synthetically produced for cosmetics) with strong skin-soothing and keratolytic properties. Originally derived from comfrey root.
What It Does
Soothes irritated skin, promotes skin cell renewal, smooths rough texture, and supports barrier recovery.
Best For
Benefits
- Anti-irritant — reduces redness and skin sensitivity
- Promotes skin cell renewal for smoother texture
- Moisturizing and conditioning
- Extremely gentle — suitable for compromised and reactive skin
When to Be Careful
- Works as a support ingredient rather than a primary active — won't be the hero of any formula
Clean beauty brands reach for allantoin when they want a soothing, skin-conditioning ingredient with a strong safety profile and natural origin story. It signals that a formula is designed for sensitive or reactive skin.
People overlook it because it sounds synthetic and industrial. But allantoin is naturally derived (comfrey root), has a very long safety track record, and does real soothing work in formulas.
A background ingredient in many formulas — no specific step required. Found in cleansers, serums, SPF, and moisturizers.
All skin types, especially people in an irritation or barrier-recovery phase.
No real cautions — allantoin is extremely well tolerated.
Not applicable. Allantoin is a support ingredient, not something used at high standalone concentrations.