Mandelic Acid: The Complete Guide

Mandelic acid is the gentle exfoliant — an alpha hydroxy acid (AHA) that refines and brightens without the sting stronger acids can cause. This guide explains what it is and who it suits.

What is mandelic acid?

Mandelic acid is an AHA derived from bitter almonds. Its molecule is larger than other AHAs like glycolic acid, so it penetrates more slowly and evenly — which makes it gentler and better suited to sensitive skin and deeper skin tones, where harsher acids can cause irritation or uneven results.

What does mandelic acid do for skin?

  • Refines texture — gently loosens dull surface cells for smoother, brighter skin.
  • Evens tone — helps fade the look of dark spots and unevenness over time.
  • Gentle on sensitive skin — a good introduction to exfoliating acids for reactive or acne-prone skin.

How to use mandelic acid

Because it’s gentle, mandelic acid can be used more readily than stronger acids, but start a few times a week and build up. Always follow with SPF in the morning, as exfoliating acids increase sun sensitivity. Our Glow Toner uses a low level of mandelic acid with soothing botanicals as an easy, non-stripping refining step. Avoid stacking it with strong retinol or other acids in the same routine while your skin adjusts.

See how it fits the range in the Ingredient Glossary, or find your match with the skin quiz.

Frequently asked questions

Is mandelic acid good for sensitive skin?

Yes — its larger molecule penetrates slowly and evenly, making it one of the gentlest AHAs and a good choice for sensitive or reactive skin.

Mandelic acid vs glycolic acid — what’s the difference?

Glycolic acid is smaller and stronger but more irritating; mandelic acid is larger, gentler and better tolerated, especially on sensitive skin and deeper skin tones.

Can I use mandelic acid with retinol?

Introduce them separately at first, as combining acids and retinol can irritate. Once your skin is used to each, alternate nights is a common approach.

Do I need SPF with mandelic acid?

Yes. Any exfoliating acid increases sun sensitivity, so daily morning SPF is essential.