What is the maximum recommended concentration of AHAs in skin products?

• A. 10%
• B. 5%
• C. 15%
• D. 20%

Answer: (A)

AHAs exfoliate by loosening the bonds between dead skin cells, which helps improve texture, brightness, and even tone. Because this can irritate skin and increase sensitivity to sunlight, products for home use are limited to a conservative amount. The upper limit commonly cited for over-the-counter skincare products containing AHAs is about 10%. This level delivers noticeable exfoliation for most people while keeping the risk of irritation or sun sensitivity manageable with consistent sunscreen use. Higher concentrations, like 15% or 20%, are generally reserved for professional chemical peels performed under supervision, where a clinician can monitor the skin and provide appropriate aftercare. Lower concentrations, such as around 5%, are milder options for sensitive skin or first-time users.