Also known as: Alpha-Hydroxy Acid, Milk Acid
Lactic acid is an AHA derived from milk or fermentation. It has a larger molecular weight than glycolic acid, making it gentler and better suited to sensitive skin. In addition to exfoliation, it acts as a humectant by binding water to the skin. It also inhibits tyrosinase, providing mild brightening benefits. The gentlest of the commonly used AHAs.
Comedogenicity ratings are based on the rabbit ear assay model. Individual skin responses vary. See our article on comedogenicity ratings for context.
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