About this product
COSRX The AHA 2 BHA 2 Blemish Treatment Serum is a serum-gel with 2% AHA and 2% BHA to provide balanced exfoliation for oily, blemish-prone skin without the risk of over-exfoliation. The gel-serum texture applies smoothly and works overnight to clear congestion and refine skin texture.
Best for oily, combination, acne-prone skin looking to address acne, blemishes, excess oil — with a focus on active blemish treatment.
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Quick Stats
Key Ingredients
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Product Claims
Common Allergens
Based on confirmed product attributes. Always check the full ingredient list for personal allergens.
Always check the full ingredient list if you have known allergies or sensitivities.
How to Use
- 1Apply to blemished areas
- 2Use 1-2 times daily
- 3Start 2-3 times weekly
Patch Test Recommended
This product contains high-strength actives. Before full application, apply a small amount to your inner arm or jaw and wait 24 hours to check for irritation.
If you experience redness, burning, or itching — discontinue use and consult a dermatologist.
Dermatologist Note
2% glycolic + 2% salicylic acid + PHA and zinc PCA for multi-action exfoliation.
Based on published clinical literature and dermatological research.
Ingredient Analysis
Full Ingredient List (INCI)
4 ingredientsListed in order of concentration (highest first)
Glycolic Acid (AHA), Salicylic Acid (BHA), Gluconolactone (PHA), Zinc PCA
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Disclaimer: The information on this page is for informational purposes only and does not constitute medical or dermatological advice. Always do your own research, consult a qualified professional if you have concerns, and patch test new products before full application — especially if you have sensitive or reactive skin.