AHA Exfoliants

Name: AHA Exfoliants
Creator: Val Yermakova

Glycolic acid / lactic acid / mandelic acid

Chemical exfoliation for texture and tone

Fine Line WrinklesHyperpigmentationDark SpotsPore SizeLoss of Collagen

In plain English

AHA exfoliants (glycolic, lactic, and mandelic acid are the most common) chemically dissolve the bonds holding dead skin cells on the surface, revealing fresher skin underneath. Unlike scrubs, they work invisibly without friction. With consistent use they smooth texture, fade pigmentation, and have some collagen-boosting effects at higher concentrations. The trade-off is increased sun sensitivity, so SPF the next morning is non-negotiable.

Safe for skin types

Safe forFitzpatrick I–III at standard OTC concentrations (5–10%)

Use cautionFitzpatrick IV–V: PIH risk at higher concentrations or frequent use; test carefully

Avoid ifFitzpatrick VI at high concentrations; active eczema; sunburned skin

AHA exfoliants accelerate cell turnover and can trigger post-inflammatory hyperpigmentation if overused in darker skin types. Low concentrations, infrequent use, and mandatory daily SPF reduce risk significantly.

Common misconceptions

✕Myth

“AHA exfoliants thin your skin with prolonged use.”

✓Reality

AHAs thin the dead stratum corneum (which is the intended effect) but with regular use at moderate concentrations, the viable epidermis and dermis are not negatively affected. Some research shows collagen stimulation increases dermal thickness over time.

✕Myth

“Higher concentration means better results.”

✓Reality

pH and formulation matter as much as concentration. A 10% glycolic acid at pH 3.5 is more active than a 20% formulation at pH 5. Concentration alone is a poor predictor of exfoliation efficacy or safety.

✕Myth

“You can use AHAs every day without issue.”

✓Reality

Daily use at effective concentrations commonly leads to over-exfoliation: barrier disruption, tightness, sensitivity, and increased reactivity to other products. Most dermatologists recommend 2 to 3 times per week at working concentrations.

Quick Facts

DurationDaily/alternate-day use; results in 4–8 weeks

Studies180+

FDA StatusOTC; concentrations >10% may require Rx depending on jurisdiction

Price$15–$90 / 30 ml

Should You Try This?

Probably okay to try

Educational content only. This page summarises published clinical research and is not medical advice. Consult a qualified healthcare provider before making decisions about your care.

Researched by

Val Yermakova

Informed Girl · informedgirl.com

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