What it does
May improve smoothness and radiance, depending on pH, percentage and formula.
Exfoliants
Lactic acid.
An AHA with exfoliating and humectant properties, often chosen for a more gradual approach than other acids.
- INCI name
- Lactic Acid
- Function
- An alpha-hydroxy acid exfoliant, humectant and pH regulator.
- Information level
- Good cosmetic evidence
- Last reviewed
- 22 September 2026
Who may benefit
Normal or dry skin that tolerates exfoliation.
Compatibility
Humectants, ceramides and barrier creams.
Precautions
Even formulas considered gentle may irritate. Introduce gradually and use SPF.
How to use it
Evening or as directed.
Concentrations
The percentage cannot be inferred from INCI order. WAI LAB shows it only when stated by a verifiable source.
HOW TO READ IT
What it means in the INCI list?
In the European Union, ingredients above 1% are listed in descending order by weight; below 1%, they may appear in any order. Their position therefore cannot be used to calculate an exact percentage.
Its position helps you understand the formula, but does not on its own establish effectiveness or an exact percentage.
SOURCES
Where the information comes from.
WAI LAB distinguishes cosmetic function, regulatory context and scientific literature. This information is not a substitute for medical advice.
FROM UNDERSTANDING TO CHOOSING
Products with Lactic acid.
151 catalogue products list a recognised form of this ingredient in their INCI.
151 resultsVerified profiles with declared concentrations appear first.
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
Verified
VerifiedWAI 94/100 · partialElemis
24 of 151 shown