What it does
- Gently exfoliates with minimal irritation.
- Strongly humectant — hydrates as it exfoliates.
- Provides antioxidant and chelating benefits.
How it works
Lactobionic acid is a bionic acid (a next-generation PHA) with multiple hydroxyl groups, widely documented as a gentle exfoliant that also binds water well and chelates metals. It is a good choice for sensitive skin and is generally less photosensitising than classic AHAs.
Use level
- Typical use level
- typically 3–10%
Commonly used at 3–10% at low pH. A gentle, hydrating alternative to AHAs.
Formulation considerations
- Water-soluble; low pH drives exfoliation.
- Strongly humectant — less drying than many acids.
- Well tolerated by sensitive skin.
What it pairs with & what to avoid
Pairs well with
- Hydrators and soothing actives
- Niacinamide
Use with care / avoid
- Over-layering with other strong acids
Regulatory status
Lactobionic acid is listed in the EU CosIng database and is a well-established gentle exfoliant.
Common questions
What is lactobionic acid?
A bionic/polyhydroxy acid that gently exfoliates while strongly hydrating, suiting sensitive skin.
Is lactobionic acid gentle?
Yes; it is among the gentlest exfoliating acids and is very hydrating.
What percentage of lactobionic acid is used?
Commonly 3–10% at low pH.