Lactic Acid/Glycolic Acid Copolymer is a polymer (polylactic-co-glycolic acid type) derived from alpha-hydroxy acid units, used in skincare for gentle exfoliation and as a film-forming or microsphere delivery agent. It can provide gradual release of acid monomers, offering milder exfoliating effects than free AHAs.
| Reported effect | How often | Notes |
|---|---|---|
Mild transient stinging or tingling | Common | Often occurs shortly after application, especially on sensitive or compromised skin. |
Erythema (redness) | Uncommon | Usually mild and temporary; more likely with frequent use or higher concentrations. |
Dryness or flaking | Uncommon | Reflects the exfoliating action; managed with moisturization. |
Increased photosensitivity | Uncommon | AHA-derived exfoliation can heighten UV sensitivity; sunscreen use is advised. |
Contact irritation or dermatitis | Rare | Possible in individuals with sensitive skin or barrier dysfunction. |
Allergic contact reaction | Very rare | Hypersensitivity to the ingredient is uncommonly reported. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.