COSRX AC Collection Blemish Spot Clearing Serum
By Nur → Last verified 10/5/2026
Price checked 10/5/2026
Verified 2026-10-05 on Stylevana: $18.90 (list $27.00). Prices change often, so confirm on the retailer's page.
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What we found
Based on how this product compares to others in the serums category, cross-referenced against retailer listings and market data.
Strengths
- + Contains niacinamide, asiaticoside, Ceramide NP, sodium hyaluronate and panthenol
Worth knowing
- - Not fragrance-free: the ingredient list includes essential oils (Melaleuca Alternifolia (Tea Tree) Leaf Oil)
- - A 2021 renewal added ectoin and removed rh-oligopeptide-1; the list here is the renewed formula, and older stock may differ
Key ingredients
These are the ingredients COSRX highlights for this product, cross-checked against general dermatological and cosmetic-chemistry sources, not a full INCI list.
Fragrance: The ingredient list includes essential oils, so it is not fragrance-free.
| Ingredient | What it is | What it does for skin |
|---|---|---|
| Niacinamide | A form of vitamin B3, one of the most studied ingredients in cosmetic dermatology. | Strengthens the skin barrier by boosting ceramide production, helps even out tone by limiting pigment transfer to skin cells, and can reduce the look of enlarged pores. |
| Asiaticoside | One of centella asiatica's primary triterpenoid glycosides, alongside madecassoside. | Studied for supporting wound healing and collagen synthesis; often included alongside madecassoside for a broader range of centella's soothing and repair-supporting effects. |
| Ceramide NP | One specific, well-studied type of ceramide used in skincare formulas. | Reinforces the skin barrier and helps it retain moisture, the same core ceramide function. |
| Sodium hyaluronate | The salt form of hyaluronic acid, commonly used for its water solubility and stability in formulas; molecular weight varies by product rather than being uniformly smaller. | Draws and holds moisture the same way hyaluronic acid does; how easily it absorbs depends on the specific molecular weight used, which formulas don't always disclose. |
| Panthenol | Pro-vitamin B5, which converts to pantothenic acid once absorbed into skin. | Hydrates as a humectant, supports wound healing, and has anti-inflammatory, soothing effects on irritated skin. |
| Allantoin | A soothing compound, naturally occurring in some plants and also made synthetically. | Calms irritation and supports skin healing, often paired with other barrier-focused ingredients. |
What the brand says
COSRX's own marketing claims, not our own findings.
- Serum to reduce traces of acne and soothe and fade red spots
- CentellAC-Rx Complex: madecassic acid, asiaticoside and asiatic acid
- 85% propolis extract to moisturize tired skin
- 4% niacinamide to refine dullness and reduce hyperpigmentation
- Absorbs quickly without a tacky feeling
Research-Based
Our assessment comes from pricing, ingredients, and published information, not personal use, the same standard we apply across the site. This product hasn't been hands-on tested yet. See our Methodology for what that distinction means.
Price history
Current price is the lowest we've recorded so far.
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Frequently asked
How much does COSRX AC Collection Blemish Spot Clearing Serum cost per mL?
$0.47 per mL (currently $18.90 for 40 mL).
Has COSRX AC Collection Blemish Spot Clearing Serum been hands-on tested?
Not yet. Our assessment for this product comes from pricing, ingredients, and published information, not personal use, the same standard we apply across the site. See our Methodology for what that distinction means.
What are the key ingredients in COSRX AC Collection Blemish Spot Clearing Serum?
The ingredients COSRX highlights for this product include Niacinamide, Asiaticoside, Ceramide NP, Sodium hyaluronate, Panthenol, Allantoin.
Sources
Pricing and availability for this product were verified against the following retailer listings.