• COSRX The Niacinamide 15 Serum 20ml — product detail image 2
  • COSRX The Niacinamide 15 Serum 20ml — product photo
  • COSRX The Niacinamide 15 Serum 20ml — product detail image 3
  • COSRX The Niacinamide 15 Serum 20ml — product detail image 4
  • COSRX The Niacinamide 15 Serum 20ml — product detail image 5
  • COSRX The Niacinamide 15 Serum 20ml — product detail image 6
  • COSRX The Niacinamide 15 Serum 20ml — product detail image 7
  • COSRX The Niacinamide 15 Serum 20ml — product detail image 8
  • COSRX The Niacinamide 15 Serum 20ml — product detail image 9
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Cosrx The Niacinamide 15 Serum 20ml

€23,99
€23,99
Tax included. Shipping calculated at checkout.
SIZE
    Description

    What it is

    Cosrx The Niacinamide 15 Serum 20ml is a COSRX Korean serum or essence for a product-specific daily skincare routine.

    Why you'll love it

    • Adds a focused COSRX skincare step after cleansing
    • Highlights niacinamide in the labeled formula
    • The serum or essence format layers into a simple Korean skincare routine

    Key ingredients

    Water, Pentylene Glycol, Niacinamide(15%), Butylene Glycol, Acetyl Glucosamine, 1,2-Hexanediol, Zinc PCA, Trehalose, Xanthan Gum, Pullulan, Allantoin, Ethylhexylglycerin, Sodium Phytate, Citric Acid, Tocopherol.

    How to use

    Apply an appropriate amount after cleansing and lighter skincare steps, then gently pat until absorbed. Follow the package directions and use sunscreen during the day where appropriate.

    Who it's for

    Customers exploring COSRX Korean skincare for the product's labeled concern and texture.

    Product FAQ

    How should I use Cosrx The Niacinamide 15 Serum 20ml?

    Apply an appropriate amount after cleansing and lighter skincare steps, then gently pat until absorbed. Follow the package directions and use sunscreen during the day where appropriate.

    Where can I find the complete ingredients?

    See the product package and the official COSRX product page for the current complete ingredient list; formulas may change by market.

    K-beauty skin profile

    K-beauty skin profile

    COSRX serum}} for Visible pores, Dullness.

    Product type
    COSRX serum
    Routine step
    AM + PM
    Skin concerns
    Visible pores, Dullness
    Key ingredients
    Niacinamide
    Texture
    Serum
    Use frequency
    Daily
    Highlights
    Minimizes pores for a smoother appearance., Brightens skin tone for a radiant look.
    Fragrance free
    Yes
    Alcohol free
    Yes
    Details

    Cosrx The Niacinamide 15 Serum 20ml is a COSRX Korean serum or essence for a product-specific daily skincare routine. Adds a focused COSRX skincare step after cleansing Highlights niacinamide in the labeled formula The serum or essence format layers into a simple Korean skincare routine
    How to use

    Apply an appropriate amount after cleansing and lighter skincare steps, then gently pat until absorbed. Follow the package directions and use sunscreen during the day where appropriate.
    Ingredients

    Water, Pentylene Glycol, Niacinamide(15%), Butylene Glycol, Acetyl Glucosamine, 1,2-Hexanediol, Zinc PCA, Trehalose, Xanthan Gum, Pullulan, Allantoin, Ethylhexylglycerin, Sodium Phytate, Citric Acid, Tocopherol.

    Shipping, returns & support
    • Authentic K-beauty Genuine products sourced through trusted distributors.
    • Global delivery We ship to the US, Europe, and Africa, including Morocco. US delivery is 7 to 10 business days; Europe, Africa, and other international destinations are 3 to 5 business days.
    • 14-day return window Eligibility and item-condition rules apply.
    • Customer support Questions about a product, order, or routine? Email us at contact@dewberrykorea.com.
    • Secure checkout Payments are processed securely through Shopify checkout.
    COSRX The Niacinamide 15 Serum 20ml — product detail image 2
    COSRX The Niacinamide 15 Serum 20ml — product photo
    COSRX The Niacinamide 15 Serum 20ml — product detail image 3
    COSRX The Niacinamide 15 Serum 20ml — product detail image 4
    COSRX The Niacinamide 15 Serum 20ml — product detail image 5
    COSRX The Niacinamide 15 Serum 20ml — product detail image 6
    COSRX The Niacinamide 15 Serum 20ml — product detail image 7
    COSRX The Niacinamide 15 Serum 20ml — product detail image 8
    COSRX The Niacinamide 15 Serum 20ml — product detail image 9
    • 5 stars: 23 (70%)
    • 4 stars: 6 (18%)
    • 3 stars: 3 (9%)
    • 2 stars: 0 (0%)
    • 1 star: 1 (3%)
    M
    Michelle-Joy C.

    The Niacinamide 15 Serum

    C
    Cassandra-Louise B.

    The Niacinamide 15 Serum

    M
    Mia-Rose B.

    The Niacinamide 15 Serum

    M
    Maggie-Belle B.
    Excellent

    It clear your face and smooth it, Very good to used

    C
    Charlotte-Belle A.

    The apprearance of my skin is visibly improved. Cannot use it too often cause my skin is too sensitive.

    V
    Vivian-Louise Z.
    Glowy skin

    Does what it promises! Good qualitative product

    H
    Harper K.
    Love it

    Great product

    E
    Ethan B.

    The Niacinamide 15 Serum

    L
    Lane G.
    My go to AM serum

    I love how lightweight and gentle this serum is. And despit the high dose of active ingredients it is great for every day. My skin has definitley cleared up as well.

    N
    Nina-Louise A.
    Gut

    Gut

    L
    Lane G.
    Great for breakouts

    I love this serum it's great for acne prone skin, especially when you have blackheadss. I use it in the PM and it's really helped keep my skin clear.

    F
    Francesca-Rose B.

    The Niacinamide 15 Serum

    L
    Lauren I.

    Excelente

    M
    Marlowe I.
    serum

    using it for a few days now, not sure how much it does as i started to use quite a few new products at once. no issues after applying

    R
    Rebecca-Joy Z.

    The Niacinamide 15 Serum

    D
    Drew B.
    Serum

    Perfect serum. Brightened my face and especially my dark spots and left marks of my acne. 100% recommend.

    C
    Catherine-Rose B.

    The Niacinamide 15 Serum

    O
    Olivia-Louise B.
    GREAT

    GREAT SERUM not greasy

    Z
    Zoe-Joy B.

    It’s too strong for my face,Got rashes reaction.

    E
    Eliana-Joy A.
    Too intense for my sensitive skin

    10% niacinamide are enough i guess, 15% in this product were too much for me. Bought this to reduce red spots quicker after finally getting rid of my acne - but it was too intense, I felt my skin getting worse and a kind of burning feeling after applying that didn’t go away. Discontinued using it immediately, maybe it works on a more intact skin barrier than I have, but I wouldn’t recommend it.

    A
    Avery D.

    Nice texture, has really been improving my imperfections

    M
    Marie-Joy C.
    The star of my evening routine!

    This is my second bottle, and honestly, I’ve never seen something work this well in my evening routine. Just cleanse your skin, use a toner, apply this serum, and ta-da — finish with your moisturizer and go to bed. Thanks to this serum and the vitamin C one I use in the morning, I realized I don’t need a million different serums or overly complicated routines. I’m so glad I got rid of all those unnecessary steps. It’s been amazing for my skin, and I always make sure to keep a backup bottle!

    J
    Jonah M.
    Good

    Does not irritate my skin. I have been using it for few days now, and so far happy with the results.

    C
    Catherine-Louise A.

    The Niacinamide 15 Serum

    A
    Amira-Louise Z.
    Love it

    Just love it

    J
    Jordan Q.
    Good product

    Clear substance that sinks into the skin so no white cast. Does not stay sticky for a long time. Restored my skin barrier pretty quick as I normally have hormonal acne around my jaw and this was a lot less after using this for a couple of weeks.

    C
    Cameron U.
    Perfect

    My 3rd bottles, and will continue. Perfect combination with vitamin C serum. My skin is loving it

    J
    Jade M.
    nice

    good quality but not too much effect

    B
    Bailey F.

    These products makes my skin smooth and glow. I highly recommend.

    E
    Eva C.
    Good

    Good serum

    F
    Fatima-Joy B.
    Super

    My stubborn black head has gone

    A
    Annabelle-Joy Z.
    It’s working

    It works for me, it heals my acne fast…

    V
    Ville Y.

    Super good

    Authentic Korean beauty, selected for real routines

    Dewberry Korea curates authentic K-beauty products with visible product details, routine guidance, and clear availability.

    Why Dewberry Korea?

    • Authentic K-Beauty

      100% genuine Korean skincare sourced from trusted distributors.

    • Global Delivery

      We ship to the US, Europe, and Africa including Morocco. US delivery is typically 7 to 10 business days; Europe, Africa, and other international destinations are typically 3 to 5 business days. Carrier conditions and destination can affect exact dates.

    • Clear Product Guidance

      Ingredients, directions, skin concerns, and routine details are shown when available.

    • Trusted Retailer

      Clear availability, pricing, and product information before checkout.