AC Collection Blemish Spot Clearing Serum
AC Collection Blemish Spot Clearing Serum
Product Description
Product overview
A multi-functional post-acne care serum featuring CentellAC-Rx Complex, 4% Niacinamide, Propolis Extract, and EGF to calm redness, fade dark spots, and recover skin texture after breakouts. Lightweight formula absorbs quickly without stickiness.
CentellAC-Rx Complex
Proprietary blend of Madecassic Acid, Asiaticoside, and Asiatic Acid derived from Centella Asiatica for optimal skin healing and calming.
Texture & feel
SENSORYCentellAC-Rx Complex
Proprietary blend of Madecassic Acid, Asiaticoside, and Asiatic Acid derived from Centella Asiatica for optimal skin healing and calming.
4% Niacinamide
Clinically-proven concentration to fade hyperpigmentation, control sebum, and brighten overall skin tone after acne.
Propolis Extract
First ingredient in the formula. Antibacterial and skin-barrier strengthening bee-derived extract for soothing protection.
EGF (Epidermal Growth Factor)
rh-Oligopeptide-1 to boost collagen and elastin production, supporting skin renewal and scar recovery.
Safety & compatibility
SAFEContains no retinoids, salicylic acid, or other pregnancy-concerning ingredients. Niacinamide and Centella are both considered safe during pregnancy and breastfeeding. Always consult your healthcare provider.
Contains Sunflower Seed Oil, Macadamia Oil, Polyglyceryl-10 Laurate/Myristate, and Glyceryl Stearate which may feed Malassezia yeast. Not recommended for fungal acne sufferers.
Most ingredients are non-comedogenic. Low risk of clogging pores when used as directed on acne-prone skin.
Contains Melaleuca Alternifolia (Tea Tree) Leaf Oil which provides anti-acne benefits but may cause sensitivity in some individuals. Patch test recommended.
Ingredient breakdown
INGREDIENTSPropolis ExtractKey Ingredient
A powerful bee-derived ingredient with natural antibacterial, anti-inflammatory, and wound-healing properties. As the first ingredient, it forms the base of this serum's soothing and protective benefits.
- Antibacterial: Helps fight acne-causing bacteria on skin
- Barrier Support: Strengthens skin's natural defense against environmental stressors
- Wound Healing: Promotes faster recovery of damaged skin
Niacinamide 4%Proven
Vitamin B3 derivative that's a true skincare multi-tasker. At 4% concentration, it effectively targets post-acne concerns without irritation risk of higher concentrations.
- Brightening: Inhibits melanin transfer to fade dark spots and hyperpigmentation
- Sebum Control: Regulates oil production to reduce shine
- Barrier Repair: Increases ceramide synthesis for stronger skin
- Anti-inflammatory: Calms redness and reduces acne lesions
CentellAC-Rx ComplexProven
COSRX's proprietary formula combining three active compounds from Centella Asiatica optimized for acne-damaged skin recovery.
- Madecassic Acid: Protects and calms irritated skin, promotes collagen synthesis
- Asiaticoside: Antioxidant with wound-healing properties, maintains clear skin
- Asiatic Acid: Strengthens skin barrier and improves overall skin balance
rh-Oligopeptide-1 (EGF)Promising
Epidermal Growth Factor - a cell-signaling peptide that stimulates skin cell renewal. Nobel Prize-winning ingredient for skin regeneration.
- Collagen Boost: Stimulates production of collagen and elastin
- Skin Renewal: Promotes cell proliferation for faster turnover
- Scar Recovery: May help improve appearance of acne scars over time
Ceramide NPProven
Skin-identical lipid that makes up 50% of the skin barrier. Essential for maintaining hydration and protecting against environmental damage.
- Barrier Repair: Fills gaps between skin cells for stronger protection
- Moisture Lock: Prevents transepidermal water loss
24 ingredients
Propolis Extract, Butylene Glycol, Niacinamide, Panthenol, 1,2-Hexanediol, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Ectoin, Ethylhexylglycerin, Glycerin, Polyglyceryl-10 Laurate, Polyglyceryl-10 Myristate, Allantoin, Sodium Hyaluronate, Asiaticoside, Asiatic Acid, Madecassic Acid, Helianthus Annuus (Sunflower) Seed Oil, Macadamia Ternifolia Seed Oil, Melaleuca Alternifolia (Tea Tree) Leaf Oil, Sucrose Distearate, Glyceryl Stearate, Hydrogenated Lecithin, Dipropylene Glycol, Ceramide NP, rh-Oligopeptide-1
Where it fits in your routine
ROUTINEApply after water-based toners and before heavier serums or moisturizers. Can be used both morning and night. For intensive spot treatment, apply with a soaked cotton pad on problem areas.
How to use
HOW TO USECleanse & Tone
Start with clean, toned skin. The serum absorbs best on slightly damp skin after toner application.
Dispense 2-3 Drops
Use the dropper to apply 2-3 drops onto your fingertips or directly onto face. A little goes a long way with this concentrated formula.
Pat & Spread
Gently spread across face, avoiding eye and mouth areas. Pat gently until fully absorbed - takes about 15-30 seconds.
Optional: Cotton Pad Method
For intensive spot treatment, soak a cotton pad and apply to troubled areas for 5-10 minutes as a quick mask.
Who is it for?
WHOPerfect for you if:
- You have post-acne marks, dark spots, or hyperpigmentation
- Your skin is prone to redness and inflammation from breakouts
- You need a gentle, multi-functional serum for acne recovery
- You want to improve uneven skin texture from scarring
- You're looking for a lightweight, non-sticky formula
- You're pregnant or breastfeeding and need safe acne care
Consider alternatives if:
- You have fungal acne (malassezia) - contains triggering ingredients
- You're allergic to bee products (contains Propolis)
- You need active acne treatment (this is for post-acne care)
- You're looking for immediate, dramatic results
- You're sensitive to Tea Tree Oil
- You have very dry skin and need heavy moisturization
Skin type compatibility
SKIN TYPESLightweight, watery texture absorbs quickly without adding shine. Niacinamide helps control sebum production.
Balances well across different face zones. Light enough for T-zone, hydrating enough for cheeks.
Specifically designed for post-acne care. Non-comedogenic formula won't trigger new breakouts.
Dermatologist tested and hypoallergenic. Tea Tree Oil may cause sensitivity in some - patch test first.
May not provide enough moisture alone. Layer with a hydrating toner and rich moisturizer for best results.
Results timeline
WEEK 8-12+Soothing & Calming
Immediate reduction in redness and inflammation. Skin feels calmer and more comfortable. Breakouts appear less angry.
75% noticed calming effectsSkin Texture Improvement
Smoother skin texture, improved hydration. Early signs of dark spot fading. Skin looks healthier overall.
60% saw texture improvementVisible Brightening
Noticeable reduction in post-acne hyperpigmentation. More even skin tone. Acne scars begin to appear softer.
55% reported brighter skinComprehensive Results
Significant improvement in dark spots and scarring. Best results come with consistent daily use. Some users may need additional bottles.
45% saw significant scar improvementRatings by platform
11K+ REVIEWSPros & cons
BALANCEDPraised
- Effectively calms redness and inflammation
- Lightweight formula absorbs quickly
- Pregnancy and breastfeeding safe
- No sticky or greasy residue
- Clinically-proven 4% niacinamide concentration
- Cruelty-free and paraben-free
- Versatile - works for spot treatment or full face
- Layers well under other products
Criticized
- Small bottle size (40ml) for the price
- Results take time - not an overnight fix
- Not effective for active acne treatment
- Not fungal acne safe
- Tea tree scent may bother some users
- May not hydrate enough for dry skin
- Doesn't dramatically reduce deep scarring
Budget-friendly alternatives (dupes)
DUPESHigher niacinamide concentration (10% vs 4%) with added zinc for oil control. Lacks Centella complex, EGF, and propolis. Better for pure brightening, less comprehensive for post-acne recovery. Fungal acne safe.
Contains 4% niacinamide plus 3% tranexamic acid for targeted hyperpigmentation. No Centella or EGF. More focused on dark spots, less on overall acne recovery and soothing.
Pure Centella Asiatica extract (higher concentration). More focused on soothing and calming. Lacks niacinamide, EGF, and propolis. Fungal acne safe. Better for pure soothing, less for brightening.
Comparison with competitors
SIDE-BY-SIDEStorage & shelf life
12 MONTHS12 months after opening
Store in a cool, dry place away from direct sunlight. Room temperature is fine - no refrigeration needed.
Frosted plastic bottle with glass dropper for hygienic, precise dispensing
Yes - 40ml is under the 100ml TSA limit for carry-on luggage
Frequently asked questions
FAQYes, this serum is considered safe for use during pregnancy and breastfeeding. It contains no retinoids, salicylic acid, hydroquinone, or other ingredients typically advised to avoid during pregnancy. The key actives - Niacinamide (Vitamin B3) and Centella Asiatica - are both widely regarded as pregnancy-safe. However, always consult your healthcare provider before introducing new skincare products during pregnancy or while nursing.
No, this serum is NOT fungal acne safe. It contains several ingredients that may feed Malassezia yeast, including Helianthus Annuus (Sunflower) Seed Oil, Macadamia Ternifolia Seed Oil, Polyglyceryl-10 Laurate, Polyglyceryl-10 Myristate, and Glyceryl Stearate. If you have fungal acne, consider alternatives like The Ordinary Niacinamide 10% + Zinc 1% or SKIN1004 Madagascar Centella Ampoule, both of which are fungal acne safe.
Yes, with some considerations. Niacinamide (the main active) is generally compatible with most ingredients. For best results: Use Vitamin C in the morning and this serum at night to maximize efficacy. When using with retinol, apply this serum first, wait for absorption, then apply retinol. With AHA/BHA, you can use them in the same routine but on different steps - exfoliate first, then apply this serum. If you experience any irritation, alternate days between actives.
This serum is best suited for oily, combination, and acne-prone skin types. The lightweight, watery formula absorbs quickly without leaving residue, making it excellent for those who struggle with excess oil. It's also well-suited for sensitive skin as it's dermatologist tested and hypoallergenic. Dry skin types can use it but should layer with a hydrating toner and rich moisturizer for best results.
Results vary by individual, but most users report: Week 1-2: Calming of redness and inflammation; Week 3-4: Smoother skin texture and improved hydration; Week 5-8: Visible fading of dark spots and hyperpigmentation; Week 8-12+: Significant improvement in acne scars and overall skin clarity. Patience is key - this is a gradual recovery serum, not a quick fix. Consistent twice-daily use yields the best results.
Apply this serum as step 3 in your routine: (1) Cleanser, (2) Toner, (3) This Serum, (4) Other serums/treatments if any, (5) Moisturizer, (6) Sunscreen (AM only). The thin, watery texture means it should go before heavier products. Apply 2-3 drops to slightly damp skin and pat gently until absorbed. Can be used both morning and night.
This serum has a low comedogenic rating of 1/5, meaning it has minimal pore-clogging potential. Most ingredients are non-comedogenic, and the formula is specifically designed for acne-prone skin. COSRX lists it as non-comedogenic on retail sites like Dermstore. However, everyone's skin is different - if you're particularly sensitive to certain ingredients, patch test before full-face application.
The serum has a PAO (Period After Opening) of 12 months. Once opened, it should be used within one year for optimal efficacy. Store in a cool, dry place away from direct sunlight. The dropper packaging helps maintain hygiene by minimizing contamination. With regular twice-daily use, a 40ml bottle typically lasts 2-3 months, so you'll likely finish it well before the 12-month mark.
Verdict: The COSRX AC Collection Blemish Spot Clearing Serum is a solid choice for post-acne care, particularly for those with oily or combination skin dealing with dark spots, redness, and uneven texture after breakouts. Its gentle yet effective formula combining 4% Niacinamide, Centella Asiatica complex, Propolis, and EGF delivers comprehensive recovery benefits without irritation. While it won't treat active acne or work overnight, consistent use yields gradual improvement in skin clarity and tone. The main drawbacks are its small size for the price and unsuitability for fungal acne sufferers. For those seeking a pregnancy-safe, multi-functional serum for acne recovery, this is an excellent K-beauty option with proven ingredient backing.
Product Overview
Quick product notes are a great way to check if a product is free from commonly avoided ingredients by skincare enthusiasts. These preferences come about for different reasons depending on the ingredient such as personal experiences, sensitivities, health preferences & etc.
Just because a product is not free from a common preference does not mean it's a bad product! You can make a personal decision whether or not you want to use a product that contains these ingredients or not - click the labels of the preference to read more about them.
Quick Product Notes
Ever used a product that promised a certain effect but provided no results? It might not have contained any notable ingredients that could have been responsible for that promised effect. It doesn't matter what the marketing or packaging «promises» it can do, if it doesn't contain anything that can help - then the likelihood of it helping is low.
We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.
Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.
Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you
Notable Effects & Ingredients
Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.
We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.
A product that contains good or bad ingredients for your skin type doesn't always flat out make the entire product good or bad for your skin. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine your skins reaction.
One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!
Ingredients Related to Skin Types
Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.
EWG is seen by many to be more on the alarmist side in their assignment of health ratings resulting in rating ingredients as riskier than they actually are. We recommend using this a reference point rather than a strict guide of ingredient safety and to always do further research if into ingredients that you may find suspect.
Ingredient Safety Breakdown
Product ingredient list
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
| 0 |
Propolis Extract
Skin Conditioning
|
Promotes Wound Healing
Redness
Irritation
|
|
| 1 |
Butylene Glycol
Solvent, Skin Conditioning, Masking, Fragrance, Humectant, Viscosity Controlling, Viscositydecreasing Agent
|
Hydrating
|
|
| 1 |
Panthenol
Skin Conditioning, Antistatic Agent, Hair Conditioning
|
Promotes Wound Healing
Hydrating
Redness
Irritation
|
|
| 1 |
1,2-Hexanediol
Solvent, Skin Conditioning
|
Hydrating
|
|
| 0 |
Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Emulsion Stabilising
|
|






