Mandelic Acid
INCI: other AHAs
Also known as: Alpha-Hydroxyphenylacetic Acid, Amygdalic Acid
The gentle brightener
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
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Mandelic Acid: A Review of Its Use in Skin Care Cosmetics, 2009
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Comparative study of alpha-hydroxy acids on skin properties Dermatologic Surgery, 1998
How to Use
Safety & Precautions
Related Ingredients
Acid
Acids are anything with a pH lower than 7 is considered acidic
AHA
AKA alpha hydroxy acid Exfoliates skin and improves visible signs of ageing
AHA - Alpha Hydroxy Acid
Water-soluble acids for surface exfoliation and renewal
Ammonium Glycolate
Synthetic form of glycolic acid used as a pH adjuster and exfoliant
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