Glycolic Acid
AHA, Alpha Hydroxy Acid
AStrong clinical evidence (multiple RCTs)Safety: Use with caution
Chemical Function
Smallest AHA; exfoliates by loosening dead-cell bonds.
Scientific Evidence
RCTs confirm improved texture, tone, and collagen stimulation with regular use.
Quality of EvidenceStrong
Interactions
Avoid same-session use with retinol and strong vitamin C; increases sun sensitivity — use at night with daily SPF.
Pro-Aging Relevance
Resurfaces dull, thinning mature skin and supports collagen.
The Science Behind Glycolic Acid
Glycolic acid is the smallest alpha-hydroxy acid, so it penetrates easily to dissolve the glue holding dead cells. This reveals fresher skin and signals renewal. Start weekly and build tolerance.
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