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Cosrx

Cosrx the Niacinamide 15

Cosrx the Niacinamide 15 is a high-strength serum that targets blemishes, excess oil, and uneven tone for a visibly clearer complexion.

£ 24.00£ 38.00 Save 37%

Cosrx the Niacinamide 15 is a high-strength serum that targets blemishes, excess oil, and uneven tone for a visibly clearer complexion.

100% Authentic · Free shipping over £ 75.00

  • Direct from authorized distributors
  • Sealed original packaging — batch code visible
  • Verify your batch number with Cosrx
  • 2× money-back guarantee if not authentic
How to use
- After cleansing, apply toner if desired. - Dispense 2–3 drops of serum onto clean, dry skin. - Gently spread over face, focusing on oily zones and blemish-prone areas. - Allow to absorb, then follow with moisturizer. - Finish with broad-spectrum sunscreen in the morning. Use once daily, then build to twice daily as tolerated.
Key ingredients
- Niacinamide 15%: Refines the look of pores, balances sebum, and improves uneven tone - Zinc PCA: Helps regulate oil and calms the feel of stressed skin - Allantoin: Soothes sensitivity and supports comfortable wear - Panthenol (Pro-Vitamin B5): Reinforces moisture retention for a supple finish - N-Acetyl Glucosamine: Team player with niacinamide to smooth texture and brighten the look of spots
Key benefits
- Helps reduce the look of active breakouts and post-blemish marks - Visibly minimizes the appearance of pores and shine - Promotes a more balanced, even-toned complexion - Lightweight, fast-absorbing texture layers well under sunscreen and makeup - Supports a stronger-looking skin barrier with daily use
Transparent pricing

Why are we 37% cheaper than others?

We're not a typical retailer — we're a parallel importer.

  • We buy directly from authorized Cosrx distributors in bulk
  • We skip the middleman markup that retail stores add
  • Same authentic products, same batch codes, same manufacturer warranty — just without the retail premium
  • Every product comes with a batch code you can verify with Cosrx

We're transparent because we have nothing to hide.

  • 📦 Ships from our United Kingdom warehouse via FedEx/UPS
  • 🚚 2–3 day express delivery
  • 📍 Tracking number sent within 24 hours
  • 🇬🇧 No customs, no duties, no surprises
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