Gentler than glycolic; larger molecule, less penetration; naturally occurring in skin (NMF component at low %); at low % (<5%) functions as humectant and pH adjuster; EU photosensitivity warning above 10% AHA total load; fermentation-derived versions can claim natural origin
Function & Common Use
Active (AHA exfoliant) / pH adjuster
Active Ingredient
Exfoliants moisturisers serums toners
Synthetic / Fermentation
Concentration Limits
No formal limit
10% leave-on; pH ≥3.5 (EU Annex III), same rules as glycolic
Baby restriction: Not in products for children under 3
Frequently Asked Questions
Is Lactic Acid safe to use in skincare?
Lactic Acid has a High concern rating. Gentler than glycolic; larger molecule, less penetration; naturally occurring in skin (NMF component at low %); at low % (<5%) functions as humectant and pH adjuster; EU photosensitivity warning above 10% AHA total load; fermentation-derived versions can claim natural origin
Is Lactic Acid allowed in India?
Lactic Acid is currently classified as "Permitted" under Indian cosmetics regulations. The maximum permitted concentration is No formal limit.
What is Lactic Acid used for in cosmetics?
Lactic Acid functions as: Active (AHA exfoliant) / pH adjuster. It is commonly found in: Exfoliants moisturisers serums toners.
Is Lactic Acid safe for babies?
Lactic Acid has baby/child restrictions: Not in products for children under 3. Avoid using products containing this ingredient on infants unless specifically formulated and labelled for baby use.
Regulatory Status
EU Annex: Annex III
Identifiers
Want to check if your product contains Lactic Acid?
Analyse a Product