Authority source
Safety basis: FDA
FDA
Lactic Acid
LAalpha-hydroxy acidAHA
pH Adjuster, Humectant, Exfoliant
Lactic acid is a naturally occurring substance found in milk. It helps adjust the pH of products and can help soften and smooth the skin.
What it is
Lactic acid is a naturally occurring alpha-hydroxy acid derived from milk or produced synthetically.
Found in
moisturizers, cleansers, exfoliating products, sunscreens
The concern
No significant concerns identified
Legal status
Generally recognized as safe for use in cosmetics and personal care products by FDA, EU, and other regulatory bodies.
Low Concern
Generally recognized as safe for use in cosmetics and personal care products.
Evidence & sources
Article / explainer
Article / explainer
No highly relevant article explainer found yet.
Video explainer
Lactate vs. Lactic Acid Explained | Muscle Physiology
Video
The Movement System
Watch videoCommunity questions
Community questions
Community discussions are not used as safety evidence and no highly relevant discussion is shown for this ingredient.
Related ingredient guides
Compare this ingredient with related ingredients and common alternatives.
Salicylic Acid
A related active ingredient often compared for exfoliation, brightening, or pigment concerns.
Glycolic Acid
A related active ingredient often compared for exfoliation, brightening, or pigment concerns.
Azelaic Acid
A related active ingredient often compared for exfoliation, brightening, or pigment concerns.
Tranexamic Acid
A related active ingredient often compared for exfoliation, brightening, or pigment concerns.
Alpha Arbutin
A related active ingredient often compared for exfoliation, brightening, or pigment concerns.
Kojic Acid
A related active ingredient often compared for exfoliation, brightening, or pigment concerns.
Last updated: June 6, 2026