Su
Succinic Acid
Succinic AcidExfoliant
Mild dicarboxylic acid. Marketed for acne-prone skin; mechanism overlaps with azelaic acid at lower concentrations.
What it does
Succinic acid is a small dicarboxylic acid with mild antibacterial and pH-buffering activity. It's marketed in spot treatments and acne-positioned serums as a gentler alternative to salicylic acid or benzoyl peroxide. Effects are modest; useful as a maintenance ingredient rather than an active acne treatment.
The evidence, graded
expert consensusAHAs and BHAs can be combined safely in well-formulated products. The 'never mix them' rule is overstated — the real concern is total acid load on the skin barrier, not the chemistry of mixing them.Kornhauser 2010 · Clinical and Cosmetic Investigative Dermatology ↗
expert consensusOTC salicylic acid in the US is capped at 2% for acne and 3% for body/scalp uses under the FDA monograph. Higher concentrations (often used in-office for chemical peels or for keratosis pilaris/warts) are prescription or professional-only.FDA 2010 · 21 CFR Part 333 Subpart D ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
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