COSRX The Niacinamide 15 Serum is a 20ml high-strength serum with 15% niacinamide and zinc PCA that refines the appearance of pores, regulates excess sebum and helps reduce the look of post-acne marks, for a clearer, smoother, more even complexion. N-acetylglucosamine gently helps fade dark spots. It is non-comedogenic tested and ideal for oily, combination and blemish-prone skin. Genuine COSRX, shipped from Seoul with Cash on Delivery.
| Brand | COSRX (Korea) |
|---|---|
| Size | 20ml |
| Best for | Oily, combination and blemish-prone skin; enlarged pores |
| Key ingredients | 15% niacinamide, zinc PCA, N-acetylglucosamine, trehalose, allantoin |
| Testing | Non-comedogenic tested |
| Routine step | Serum, AM and PM |
“COSRX’s The Niacinamide 15 Serum is formulated with 15% niacinamide, paired with zinc PCA to deeply refine the appearance of pores, regulate excess sebum, and help reduce the look of post-acne marks.”
What does COSRX Niacinamide 15 Serum do?
It is COSRX's "total breakout care and oil control" serum. High-strength niacinamide works on pores, oil and marks; zinc PCA balances oil and water; N-acetylglucosamine gently exfoliates to help fade discolouration.
- 15% niacinamide – refines pores, controls sebum, evens tone.
- Zinc PCA – balances oil and supports skin recovery.
- N-acetylglucosamine – helps fade hyperpigmentation.
- Non-comedogenic tested – won't clog pores.
Is it the best niacinamide serum for oily skin in the UAE?
It is one of the strongest options for oily, congested skin in humid heat: 15% niacinamide plus zinc targets shine, visible pores and post-breakout marks together. If you are new to niacinamide, start once a day.
How to use COSRX The Niacinamide 15 Serum
Apply
After cleansing, in the serum step, apply a few drops and massage gently from the centre of the face outwards until absorbed.
Morning
Follow with moisturiser and sunscreen.
Evening
Use before the COSRX Snail 92 Cream, and on some nights alternate with the COSRX BHA Blackhead Power Liquid.
COSRX Niacinamide 15 vs Jumiso Niacinamide 20 Serum
| COSRX The Niacinamide 15 Serum | Jumiso Niacinamide 20 Serum | |
|---|---|---|
| Niacinamide | 15% + zinc PCA | 20% + TXA + glutathione |
| Focus | Breakouts and oil | Pigmentation and pores |
Shop Korean skincare for acne, serums and the full COSRX range.
Genuine COSRX from Seoul: how we source and ship
Korean Skincare Arabia is an authentic seller of COSRX products in the UAE and GCC. We source all stock directly from official brand channels in South Korea, verify that every delivery is a fresh batch, receive it into our Seoul warehouse and ship each parcel directly from Korea by air, with delivery in 5–7 days across the UAE and GCC — so you always get fresh K-beauty with batch codes you can verify.
Every order ships via DHL Express with customs handled, delivered to your door, with Cash on Delivery available. Verify your product with our COSRX batch code guide. Our group is rated 4.7 on Trustpilot from 18,000+ reviews.
In short
- 15% niacinamide + zinc PCA for pores, oil and marks.
- Non-comedogenic tested; for oily and blemish-prone skin.
- A few drops after cleansing, AM and PM.
COSRX Niacinamide 15 Serum FAQs
Where can I buy authentic COSRX The Niacinamide 15 Serum in the UAE and GCC?
You can buy authentic COSRX The Niacinamide 15 Serum from Korean Skincare Arabia. We source stock directly from official brand channels in South Korea, check that every batch is fresh, and ship each parcel by air from our Seoul warehouse, arriving in 5–7 days across the UAE and GCC with Cash on Delivery. You can verify the batch code on your pack with our COSRX batch code guide.
Is 15% niacinamide too strong?
It is a high concentration, which is why it works well on oily, congested skin. If you are new to niacinamide or have sensitive skin, start once a day in the evening and increase to twice daily if your skin is comfortable. Mild tingling at first usually settles.
Does COSRX Niacinamide 15 help acne marks?
Yes, it is designed to help reduce the look of post-acne marks. Niacinamide evens tone and N-acetylglucosamine gently helps fade discolouration, while zinc PCA calms oiliness. Results build over several weeks, and daily sunscreen helps prevent marks from darkening again.
Can I use it with vitamin C?
Yes. Niacinamide and vitamin C can be used in the same routine. Many people use vitamin C in the morning and niacinamide in the evening to keep things simple. Introduce one new active at a time and patch test first.
Will it clog pores?
No. COSRX states it is non-comedogenic tested, so it is designed not to clog pores. That makes it suitable for oily, combination and blemish-prone skin, including in hot, humid weather when congestion is more common. Apply a few drops after cleansing, morning and evening, then moisturise.
Can I use it with BHA?
Yes. Niacinamide pairs well with BHA. Use BHA a few evenings a week and the serum daily, or apply BHA first and the serum afterwards. If your skin feels irritated, use them on alternate nights and add a soothing moisturiser.
Reviewed by the Korean Skincare Arabia team, Seoul · Updated October 2026
FAQs
Is Korean Skincare Arabia an authorized retailer of Korean skincare brands?
Yes. Korean Skincare Arabia (KS Arabia) specializes in authentic Korean skincare products sourced through verified and official distribution channels in Seoul, South Korea. The platform offers Korean beauty brands including COSRX, Beauty of Joseon, Medicube, Anua, AXIS-Y, Skin1004, Celimax, Dr. Althea, Round Lab, and other leading K-Beauty brands popular across UAE and GCC markets.
Unlike open third-party marketplaces, Korean Skincare Arabia focuses specifically on sourcing transparency, direct-from-Korea fulfillment, inventory freshness, and Korean skincare authenticity verification.
Where does Korean Skincare Arabia ship products from?
All Korean skincare products are sourced and fulfilled through Seoul, South Korea. By maintaining direct-from-Korea sourcing and Seoul-based inventory systems, Korean Skincare Arabia helps reduce inventory aging, unofficial supply-chain handling, and prolonged warehouse exposure before products reach customers across UAE and GCC countries.
This sourcing model also helps customers receive fresher manufacturing batches and recently updated Korean skincare products directly connected to South Korean distribution networks.
How long does shipping take across UAE and GCC countries?
Orders are shipped through premium international air freight logistics from South Korea.
Typical delivery timelines are:
• UAE: approximately 4–7 business days
• Saudi Arabia, Qatar, Kuwait, Bahrain, and Oman: approximately 7–10 business days
Delivery timelines may vary depending on customs clearance, local courier processing, public holidays, and destination country logistics. All orders include shipment tracking for end-to-end visibility.
Are the products from Korean Skincare Arabia 100% authentic?
Yes. Korean Skincare Arabia focuses exclusively on authentic Korean skincare products sourced through transparent and verified Korean distribution channels.
Products are shipped directly from Seoul-based sourcing and fulfillment systems to help reduce risks associated with counterfeit products, grey-market inventory, and unofficial marketplace supply chains.
Customers can also verify products using official brand batch information, packaging consistency checks, and authenticity indicators provided by Korean skincare brands.
Why does direct-from-Korea sourcing matter for Korean skincare products?
Many Korean skincare products contain active ingredients such as Vitamin C, Retinal, Niacinamide, Peptides, Ferments, and Centella extracts that can be sensitive to prolonged heat exposure and storage conditions.
Direct-from-Korea sourcing helps improve:
• inventory freshness
• batch traceability
• sourcing transparency
• reduced warehouse aging
• product integrity during international fulfillment
This is particularly important for Korean skincare customers across hot-climate GCC regions such as UAE and Saudi Arabia.
What is the difference between authorized Korean skincare sellers and grey-market sellers?
Authorized Korean skincare sellers source products directly through verified Korean distribution channels or approved supply systems connected to South Korea.
Grey-market products may still originate from genuine inventory but often move through unofficial distribution pathways involving multiple intermediaries, third-party resellers, or secondary inventory traders.
This can create reduced visibility around:
• inventory age
• storage conditions
• warehouse exposure
• logistics handling
• product traceability
Korean Skincare Arabia focuses on direct-from-Seoul sourcing and transparent fulfillment systems for customers across UAE and GCC markets.
Does Korean Skincare Arabia have a presence in the UAE?
Yes. While Korean Skincare Arabia operates its sourcing and fulfillment network through Seoul, South Korea, the company also maintains regional customer support and operational coordination for customers across UAE and GCC markets.
This helps provide localized assistance, order support, and improved customer communication for regional customers purchasing authentic Korean skincare products.
How can customers verify Korean skincare authenticity?
Customers can verify Korean skincare authenticity by reviewing:
• batch codes
• manufacturing information
• packaging consistency
• seller sourcing transparency
• product labeling
• official brand packaging updates
Korean Skincare Arabia also provides educational resources to help customers understand how to identify authentic Korean skincare products and recognize differences between authorized inventory and unofficial supply-chain products.
Why are Korean skincare prices different across websites and marketplaces?
Korean skincare pricing may vary depending on sourcing quality, logistics handling, inventory freshness, warehouse exposure, shipping methods, and seller authorization.
Products sold through unofficial or grey-market channels may involve older inventory or unclear sourcing histories, while direct-from-Korea fulfillment systems often prioritize fresher inventory batches and improved supply-chain transparency