Glycolic acid and mandelic acid are both alpha-hydroxy acids (AHAs) used in exfoliating skincare. Choosing between them involves more than the ingredient name: the finished formula and your skin’s tolerance matter.
What do AHAs do?
AHA products encourage shedding of surface skin. They are used in skincare intended to improve the appearance of rough texture, uneven tone, and fine surface lines. The amount of exfoliation depends on the acid, its concentration, the product’s pH, and the other ingredients.
How do glycolic and mandelic acid compare?
Glycolic acid is a widely used exfoliating ingredient. Mandelic acid is another option that may be worth discussing if you are seeking a more gradual approach.
In one comparative study, the tested glycolic acid preparation exfoliated faster but produced more redness and increased UV sensitivity than the tested mandelic acid preparation. That finding does not mean every mandelic product is gentler than every glycolic product, or that either ingredient is right for all sensitive skin.
Why percentage and pH matter
A product’s percentage alone cannot tell you how it will feel or perform. Its pH and overall formulation also affect exfoliation. Avoid assuming glycolic products always have a lower pH than mandelic products; compare the actual finished products and their directions.
A practical way to choose
Read the label, check the intended skin types, and choose a product with directions you can follow consistently. Introduce one exfoliating product at a time and do not exceed its recommended frequency. Persistent stinging, burning, or peeling is a reason to stop and seek advice.
If your skin is currently irritated, or you use prescription treatments, ask your dermatologist before adding an acid. Strong peels and everyday serums are different products; results from professional peel research should not be treated as promises for a retail serum.
Sun protection belongs in the plan
AHAs may increase sun sensitivity. The FDA advises sunscreen, protective clothing, and limited sun exposure while using an AHA and for a week afterward. See our daily sunscreen guide for application and reapplication advice.
Explore products at Skin Care By Suzie
Browse our glycolic acid collection or explore Almond Serum with mandelic acid. The Almond Serum page identifies normal, combination, and oily non-sensitive skin as its recommended skin types—so do not assume it suits sensitive skin simply because it contains mandelic acid. Follow the current product label.
Sources
FDA: Alpha Hydroxy Acids; Comparative in vivo study of exfoliating agents.
General education. Individual suitability and results vary.





