Comparisons · 6 min read
Glycolic Acid vs Lactic Acid
Both are AHAs. Glycolic penetrates deeper; lactic also hydrates. The right choice depends on tolerance.
Updated 11 June 2026 · Reviewed by GlycolicAcid.com.au editorial
Lactic acid is a larger molecule (90 g/mol vs 76) so it penetrates less aggressively and is humectant. Glycolic works faster but can irritate sensitive skin.
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