Lactic acid is an alpha-hydroxy acid that exfoliates by loosening corneocyte adhesion and boosts hydration, while potassium lactate (its salt) acts mainly as a humectant and pH buffer. Together they smooth skin texture, improve moisture retention, and gently promote cell turnover.
| Reported effect | How often | Notes |
|---|---|---|
Transient stinging or tingling | Common | Especially at higher concentrations or lower pH on application. |
Mild erythema (redness) | Common | Usually short-lived after application. |
Dryness or peeling | Uncommon | More likely with frequent or high-strength use. |
Increased photosensitivity | Uncommon | AHAs can raise UV sensitivity; sunscreen advised. |
Irritant or allergic contact dermatitis | Rare | More common in sensitive or compromised skin. |
Chemical burn | Very rare | Associated with very high concentration or prolonged contact misuse. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.