COSRX Niacinamide 15% Face Serum, Minimizing Pores & Sebums, Blemish Treatments for Discoloration, Dark Spots, Enlarged Pores, Anti-aging, 0.67 fl.oz / 20 ml, Animal Testing-Free
by COSRX
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COSRX's 15% Niacinamide serum pairs a clinically high concentration of vitamin B3 with Zinc PCA, creating a synergistic formula targeting sebum control, enlarged pores, and hyperpigmentation. Best for Oily and combination skin with enlarged pores and Post-acne hyperpigmentation and uneven skin tone.
According to the AIScored 0–100 scoring system, COSRX Niacinamide 15% Face Serum, Minimizing Pores & Sebums, Blemish Treatments for Discoloration, Dark Spots, Enlarged Pores, Anti-aging, 0.67 fl.oz / 20 ml, Animal Testing-Free by COSRX scores 79.0/100, ranking #3 out of 27 products in Niacinamide Serums (2026). Strongest category: Texture Experience (88.0/100). Weakest: Value For Money (63.0/100).
Is COSRX Niacinamide 15% Face Serum... worth buying?
“COSRX's 15% niacinamide serum scores 79/100 for a reason — reviewers across all skin types report visible improvements in pore size and sebum control within weeks. The lightweight formula absorbs quickly without stickiness, and the combination of 15% niacinamide with Zinc PCA is scientifically sound for managing oily, acne-prone skin.”
What Do Reviewers Say About COSRX Niacinamide 15% Face Serum, Minimizing Pores & Sebums, Blemish Treatments for Discoloration, Dark Spots, Enlarged Pores, Anti-aging, 0.67 fl.oz / 20 ml, Animal Testing-Free?
Sample excerpts from currently available source material used in this product analysis.
"Llevo años, décadas, buscando productos para mis problemas de piel. Tengo una piel mixta, super sensible, con poros dilatados y por si fuera poco, con tendencia a brotes de acné hormonal. Llevo muchísimo años luchando contra esto, teniendo..."
"Helped improve my skin texture over 3-4 months of usage. Go easy, a tiny drop is good enough for one cheek. Spreads easily. Also I don’t use it every night, it can make your skin slightly dry. Put a layer of moisturiser on top. This product..."
"Cosrx serum I must say, is hands down the best facial serum I’ve ever used. From the first application, I noticed how smooth and refreshing it felt on my skin. It absorbs quickly, leaves no sticky residue, and gives my face such a healthy,..."
"Brilliant. Bought a because I needed to switch from 10% to 15% and couldn't find 15% at local Boots. Very nice texture - stings a little at the beginning but got used to it after a couple of uses. Apparently, this is normal. Lasted me aroun..."
"I am using since 3 months this is my 2nd bottle . Initially 1st week i used and felt no effects but after 15 days trying it was game changer for me . My pimple marks started lighter and my face shine came again after my pregnancy. My skin l..."
How does COSRX Niacinamide 15% Face Serum, Min... score?
Detailed score breakdown and key findings from our analysis of 64 reviews across 3 sources.
Pros
- +High 15% niacinamide concentration delivers measurable results for pores, sebum control, and hyperpigmentation — consistently reported by reviewers across skin types
- +Lightweight, fast-absorbing texture with no sticky residue; universally praised application experience
- +Zinc PCA synergises with niacinamide for enhanced oil regulation — a well-documented combination for acne-prone and oily skin
- +Clean, minimal formula: fragrance-free, paraben-free, sulfate-free, with soothing panthenol and allantoin to buffer irritation potential
- +Suitable for layering under moisturiser and SPF without pilling or heaviness
Cons
- -20ml bottle is unusually small — with twice-daily use it lasts roughly 6–8 weeks, making cost-per-ml high relative to comparable serums
- -Initial stinging or tingling is frequently reported in the first 1–2 weeks; at 15% this is expected but rules out very reactive or compromised skin barriers
- -Daily use without moisturiser can cause mild tightness or dryness, particularly in drier climates or for those not layering hydration on top
- -A small number of users report itching or irritation that did not resolve — likely due to barrier sensitivity rather than a formulation defect, but indicates the concentration is not universally tolerated
Best For
Watch Out
- !Compromised or very sensitive skin barriers — 15% is potent; start with once-daily application and build tolerance before twice-daily use
- !Persistent stinging beyond the first two weeks is a red flag for ongoing irritation; discontinue if redness or itching does not subside
- !Small bottle size means frequent repurchasing — factor this into budget expectations
- !Always follow with SPF 30+ in the morning; niacinamide does not cause photosensitivity but active skin renewal warrants sun protection
- !Avoid combining with high-strength vitamin C (L-ascorbic acid at very low pH) in the same step — apply separately to avoid potential niacin flushing risk
What is COSRX Niacinamide 15% Face Serum, Minimizing Pores & Sebums, Blemish Treatments for Discoloration, Dark Spots, Enlarged Pores, Anti-aging, 0.67 fl.oz / 20 ml, Animal Testing-Free?
COSRX Niacinamide 15% Face Serum, Minimizing Pores & Sebums, Blemish Treatments for Discoloration, Dark Spots, Enlarged Pores, Anti-aging, 0.67 fl.oz / 20 ml, Animal Testing-Free is a niacinamide serums product by COSRX, scoring 79.0/100 on AIScored.
- • The Niacinamide 15% Serum: Refine Pores, Smoothen Skin.
- • Niacinamide and Zinc PCA instantly improves skin texture and radiance by reducing excess oil and minimizing pore sizes.
- • Key Benefits: Based on real results from consumers' self assessments, the Niacinamide 15 Serum minimizes pore size, improves skin texture, and helps fade dark spots.
- • Dermatological Ingredients: 15% Niacinamide helps minimize enlarged pores and refine uneven skintone.
- • How to Use: Shake 1-2 times before use and apply 2-3 drops once or twice daily.
- • For daytime wear, follow up with SPF 30+ sunscreen.
- • Can be applied under the eye area; avoid direct eye contact.
- • COSRX Standards: All COSRX products are formulated with skin-friendly ingredients that alleviate irritated skin.
- • Hypoallergenic, Dermatologist tested, Animal Testing-FREE, Parabens-FREE, Sulfates-FREE, Phthalates-FREE.
How We Score Supplements
Our methodology analyses review data, ingredient science, and product information, then scores each product on a 0-100 scale across evidence-based categories:
Effectiveness
How well the product delivers its claimed benefits, based on reviews and ingredient evidence.
Ingredient Quality
Bioavailable forms, clinically effective dosages, clean label, minimal fillers.
Value for Money
Price relative to ingredient quality, dosage count, and effectiveness.
Side Effects Profile
Higher score = fewer side effects. 100 means virtually no adverse reactions reported.
Certifications & Testing
Third-party lab testing, GMP certification, and independent quality verification.
Overall Score
Weighted combination of all factors. Our bottom-line recommendation.
Price History (90 days)
Frequently Asked Questions
Is COSRX Niacinamide 15% Face Serum, Minimizing Pores & Sebums, Blemish Treatments for Discoloration, Dark Spots, Enlarged Pores, Anti-aging, 0.67 fl.oz / 20 ml, Animal Testing-Free worth buying in 2026? ▼
What is the best price for COSRX Niacinamide 15% Face Serum, Minimizing Pores & Sebums, Blemish Treatments for Discoloration, Dark Spots, Enlarged Pores, Anti-aging, 0.67 fl.oz / 20 ml, Animal Testing-Free in the UK? ▼
What are the pros and cons of COSRX Niacinamide 15% Face Serum, Minimizing Pores & Sebums, Blemish Treatments for Discoloration, Dark Spots, Enlarged Pores, Anti-aging, 0.67 fl.oz / 20 ml, Animal Testing-Free? ▼
Disclaimer: AIScored provides research-backed summaries based on publicly available reviews and product information. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Affiliate links may earn us a commission at no extra cost to you.
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