Mandelic Acid
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INCI: other AHAs
Reviewed by Emma · Last updated 14 Aug 2026
Also known as: Alpha-Hydroxyphenylacetic Acid, Amygdalic Acid
The gentle brightener
At a glance
Things to be aware of
Best For Skin Types
Sensitive, darker skin
Effective Concentrations
5-10%
Usage Frequency
As directed on product packaging
EWG Safety Score
What Is Mandelic Acid?
Mandelic acid is an alpha hydroxy acid (AHA) derived from bitter almonds. Its larger molecular size compared to glycolic acid means it penetrates the skin more slowly and evenly, resulting in less irritation while still providing effective exfoliation.
This gentle AHA is particularly suitable for sensitive skin types, darker skin tones (which are more prone to post-inflammatory hyperpigmentation), and those new to chemical exfoliation. It provides the benefits of AHAs without the stinging or redness often associated with stronger acids.
Mandelic acid has antibacterial properties that make it especially effective for acne-prone skin. It can help reduce breakouts while simultaneously addressing post-acne marks and uneven skin tone.
Start with concentrations around 5-10% and use 2-3 times per week, gradually increasing frequency as tolerated. As with all AHAs, sunscreen use is essential as mandelic acid increases photosensitivity.
Benefits for Your Skin
Clinical Evidence & References
- Journal of Cosmetic Dermatology, February 2023, pages 517–528; and February 2020, pages 393–399
- Molecules, September 2022, pages 1–11
- Journal of the American Academy of Dermatology, December 2020, Volume 83, Issue 6 and September 2018, pages 503-518
- Dermatologic Surgery, March 2016, pages 384-391; and January 2009, pages 59-65
- Advances in Dermatology and Allergology, June 2013, pages 140-145
Published Research
-
Mandelic Acid: A Review of Its Use in Skin Care Cosmetics, 2009
-
Comparative study of alpha-hydroxy acids on skin properties Dermatologic Surgery, 1998
How to Use
Safety & Precautions
How widely it's used
Regulatory information
Standardised cosmetic-ingredient identifiers used by regulators.
Show identifiers
- INCI Name
- MANDELIC ACID
- INN Name
- mandelic acid
- EC Number
- 202-007-6
- Function
- Antimicrobial
Frequently Asked Questions
From the Clinic
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Take the skin quizOther forms of Mandelic Acid
These appear on ingredients lists under different names but are the same substance. Mandelic Acid is the common form.
Related Ingredients
L-Mandelic Acid
Gentle AHA ideal for sensitive and darker skin tones
Luffa Cylindrica Fruit Powder
A natural plant-derived exfoliant powder derived from the luffa gourd
Magnesium Lactate
A mild buffering agent that helps balance pH and support skin conditioning
Magnesium Potassium Fluorosilicate
A mineral-based physical exfoliant for gentle surface smoothing
Mangifera Indica Seed
Plant-derived exfoliant and antioxidant from mango seed kernels
Matricaria Maritima Powder
A finely milled mineral powder that gently buffs away surface dead skin
Articles About Mandelic Acid
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