Glycolic acid (AHA)
Glycolic acid is an alpha-hydroxy acid (AHA). It is used in everyday skincare and in professional chemical peels. These uses involve different formulations and treatment plans; a familiar ingredient name does not make them interchangeable.
The formula shapes the effect
Glycolic acid can promote surface exfoliation. Its concentration, pH and other ingredients influence the effect. A headline percentage alone cannot establish the depth, recovery or suitability of a finished peel. Daily-use products should be used according to their own instructions.
What comparative evidence shows
A randomized split-face study in 20 people with acne compared professional glycolic and salicylic peels. Both improved acne without a significant difference in effectiveness during treatment. A small study of particular preparations cannot establish a universally best acid or predict results for pigmentation, scars or every skin type.
Discuss irritation and recovery
AHAs can increase sensitivity to sunlight. Discuss sun protection, existing skincare and when to pause or resume irritating products. Professional peels can cause burns, pigment changes and scarring. Ask about the actual formula, intended depth and the practitioner’s experience with your skin tone.
Read the original sources
Sources describe specific products, studies or countries. They do not establish approval everywhere.
General education. Your clinician can assess your individual suitability. Rules depend on the treatment country; FDA references concern the United States. External sources may be in another language.