exfoliant
Glycolic Acid (AHA)
글리콜산 · 甘醇酸
Also known as: AHA
What it actually does
A water-soluble exfoliant commonly used in cosmetic formulations to help loosen the bonds between surface dead skin cells for a smoother, more even-looking texture.
How to use it
Use PM only, 1–3 nights a week. Layer hydrating serums after. Always SPF the next day.
The science, in plain English
An alpha-hydroxy acid studied for loosening the bonds between dead surface cells so they shed more evenly at typical cosmetic concentrations.
Myth vs reality
A tingling sensation is not proof of effectiveness — mild sensation can be typical, but stinging or burning suggests reducing frequency or concentration and, if it persists, checking with a dermatologist.
Limitations of the evidence
Evidence for surface exfoliation and short-term texture and tone improvement is reasonably established; it is not a treatment for diagnosed pigmentation conditions.
Who may need extra caution
May not suit very reactive skin or a compromised skin barrier.
Evidence review date
Not yet reviewed
Sources
Not yet reviewed
Pairs well with
- Niacinamide
- Hyaluronic Acid
- Ceramides
- Peptides
Don't layer with
- BHA on the same night
- Retinol on the same night
- Strong Vitamin C on the same night
Shop products with Glycolic Acid (AHA)
- COS