Lactic Acid
AHA
AStrong clinical evidence (multiple RCTs)Safety: Safe
Chemical Function
AHA that gently exfoliates and hydrates.
Scientific Evidence
RCTs show improved texture and hydration with less irritation than glycolic.
Quality of EvidenceStrong
Interactions
More gentle than glycolic; still use SPF. Pairs well with hydrators.
Pro-Aging Relevance
A gentler resurfacer for sensitive mature skin that also hydrates.
The Science Behind Lactic Acid
Lactic acid exfoliates like glycolic but is larger and gentler, and it doubles as a humectant. It is the AHA most mature, sensitive skin tolerates well.
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