Ingredients

Mandelic Acid

Written by Reviewed by the SYNC editorial team Published Last reviewed Editorial standards

Mandelic Acid — an alpha hydroxy acid derived from bitter almonds with an unusually large molecule, which lets it exfoliate slowly and gently. Its size means it penetrates more evenly and causes less irritation, making it a frequent recommendation for sensitive skin and deeper skin tones. It is also valued for helping with uneven tone and breakout-prone skin.

Key points

  • Mandelic acid has one of the largest molecules among common AHAs, giving it slow, gentle penetration.
  • Its mildness makes it a popular option for sensitive skin and for those newer to chemical exfoliation.
  • It is often used to address uneven tone, mild breakouts, and the look of post-blemish marks.
  • It is frequently suggested for richer or deeper skin tones because of its lower irritation profile.
  • As with other AHAs, sun protection is important during and after use.

Frequently asked

Why is mandelic acid considered gentle?

Its large molecular size slows how quickly it penetrates the skin, which typically results in less irritation than smaller acids like glycolic. This makes it a common starting point for sensitive skin.

Can mandelic acid help with breakouts?

It can support breakout-prone skin by encouraging surface exfoliation and helping keep pores clearer, and it is often chosen for its gentleness. Results vary and consistent use over several weeks is usually needed.

Related topics

This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.

Encyclopedia

Further reading

This entry was written and checked against the sources below. They are published by clinical and scientific bodies, they are listed most readable first, and each one opens in a new tab. They are background for the whole entry rather than footnotes to individual sentences.

  1. Alpha hydroxy acid facial treatments DermNet NZ Clinical guidance dermnetnz.org
  2. Cosmetics Alpha Hydroxy Acids U.S. FDA Regulatory and safety fda.gov
  3. Safety Assessment of Alpha Hydroxy Acids as Used in Cosmetics Cosmetic Ingredient Review Regulatory and safety cir-safety.org
  4. A Prospective Study Comparing Clinical Efficacy of 30% ... PubMed Peer-reviewed (abstract) pubmed.ncbi.nlm.nih.gov
  5. Chemical peels (face peels) DermNet NZ Clinical guidance dermnetnz.org
  6. Guidance for Industry: Labeling for Cosmetics Containing Alpha Hydroxy Acids U.S. FDA Regulatory and safety fda.gov

SYNC does not publish medical advice. Nothing here replaces a consultation with a doctor or a pharmacist about your own skin.