Cited skincare — peer-reviewed evidence, no upsell.
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Mandelic Acid

Mandelic AcidExfoliant

Largest AHA. Slower-acting and gentler — often the entry point for sensitive or darker skin tones.

What it does

Mandelic acid's larger molecular size means slower penetration and less irritation. Often recommended for first-time AHA users, sensitive skin, or melanin-rich skin where aggressive exfoliation can trigger post-inflammatory hyperpigmentation.

The evidence, graded

expert consensusMandelic acid is the gentlest common AHA, but stacking it with a retinoid the same evening still raises irritation risk for sensitive skin.Kornhauser 2010 · Clinical and Cosmetic Investigative Dermatology ↗

Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.

Pairs worth knowing

Niacinamide (Vitamin B3) · works together ↗Retinol · worth separating ↗Tretinoin · worth separating ↗
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