• COSRX The Vitamin C 13 Serum 20ml — product photo
  • COSRX The Vitamin C 13 Serum 20ml — product detail image 2
  • COSRX The Vitamin C 13 Serum 20ml — product detail image 3
  • COSRX The Vitamin C 13 Serum 20ml — product detail image 4
  • COSRX The Vitamin C 13 Serum 20ml — product detail image 5
  • COSRX The Vitamin C 13 Serum 20ml — product detail image 6
  • COSRX The Vitamin C 13 Serum 20ml — product detail image 7
  • COSRX The Vitamin C 13 Serum 20ml — product detail image 8
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Cosrx The Vitamin C 13 Serum 20ml

€24,99
€24,99
Tax included. Shipping calculated at checkout.
SIZE
    Description

    What it is

    Cosrx The Vitamin C 13 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 vitamin C in the labeled formula
    • The serum or essence format layers into a simple Korean skincare routine

    Key ingredients

    13% Pure Vitamin C, Tocotrienol (Super Vitamin E), Hyaluronic Acid, Allantoin.

    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 Vitamin C 13 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 Blemishes, Dark spots, Dehydration, Visible pores, Uneven texture.

    Product type
    COSRX serum
    Routine step
    AM + PM
    Skin type
    Oily, Dry, Combination, Normal, Sensitive
    Skin concerns
    Blemishes, Dark spots, Dehydration, Visible pores, Uneven texture
    Key ingredients
    Hyaluronic acid, Vitamin C
    Texture
    Serum
    Use frequency
    Daily
    Highlights
    Fades dark spots and blemishes., Refines skin texture., Hydrates and soothes irritation.
    Fragrance free
    Yes
    Alcohol free
    Yes
    Details

    Cosrx The Vitamin C 13 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 vitamin C 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

    13% Pure Vitamin C, Tocotrienol (Super Vitamin E), Hyaluronic Acid, Allantoin.

    Shipping, returns & support
    • Authentic K-beauty Genuine products sourced through trusted distributors.
    • Clear delivery timing US delivery: 7 to 10 business days. Shipping is $20 below $50, $10 from $50 to $84.99, and free from $85.
    • 14-day return window Eligibility and item-condition rules apply.
    • US 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 Vitamin C 13 Serum 20ml — product photo
    COSRX The Vitamin C 13 Serum 20ml — product detail image 2
    COSRX The Vitamin C 13 Serum 20ml — product detail image 3
    COSRX The Vitamin C 13 Serum 20ml — product detail image 4
    COSRX The Vitamin C 13 Serum 20ml — product detail image 5
    COSRX The Vitamin C 13 Serum 20ml — product detail image 6
    COSRX The Vitamin C 13 Serum 20ml — product detail image 7
    COSRX The Vitamin C 13 Serum 20ml — product detail image 8
    • 5 stars: 21 (70%)
    • 4 stars: 3 (10%)
    • 3 stars: 5 (17%)
    • 2 stars: 0 (0%)
    • 1 star: 1 (3%)
    A
    Andrea-Grace C.
    Perfect size and texture

    Perfect size and texture.

    A
    Annie-Rose A.
    It’s okay

    I have been using this serum for 4 weeks. I don’t see a big difference (yet)

    E
    Eloise G.

    Great Vit C Serum

    C
    Catherine F.
    Great brightening serum

    Gentle on skin, helps fade dark spots and gives a nice, healthy glow.

    A
    Ariana-Joy B.
    very nice product

    introduced it to my skin and didnt find my skin was sensitive at all to this product even though its my first time with vit C. Comes with a nice pipet. serum is light and feels good on the skin. Improved lightly so far. curious how results will be in the long run and if Ill be ready to upgrade to the 23

    C
    Catherine G.
    So far so good

    This is so far the only vit C Serum that suits my sensitive skin, so all recommendations!

    A
    Ava-Louise B.
    I love it!

    I’m using it for a month and i have an acne prone sensitive skin and i never had a reaction even the first day. Just too bad it accidentally fell from my hand while using it and most of it got wasted so I’m out of it now and they’re still sold out even the C23.

    A
    Abby G.
    Good

    So far so good

    A
    Aurora-Mae B.
    Stunning!

    Love this product, you can see the result immediately. I will definitely buy again!

    K
    Katie-Belle B.

    The Vitamin C 13 serum

    A
    Adeline-Belle B.

    The Vitamin C 13 serum

    S
    Sienna-Rose A.

    The Vitamin C 13 serum

    H
    Hannah-Mae C.
    Top serum

    Love this serum!!

    E
    Edith-Joy C.
    Great oil

    Feels very lightweight on the skin. Skin is left gentle and soft. Easy absorption. No irritation. I would for sure recommend this product.

    T
    Teresa J.
    Light and brightening

    Great for people with sensitive skin! Brightens up the skin without irritating it. Lightweight and not sticky as vitamin c serums can be. Was not sure about the initial scent that the product seems to have but it is not noticeable after application. Overall a very good product for its price.

    A
    Adrian J.
    Great

    I haven’t reacted poorly to it

    B
    Blair L.

    Works for my skin

    E
    Emery C.
    Not for me

    I’ve been using the serum for the past two months now. It’s the first time I’ve used a vitamin c serum and I bought it after it was recommended to me for brightening my skin and acne scars/pigmentation. The first thing I noticed was the smell, when I opened the bottle the smell was really strong and a bit off-putting. Fortunately, when I put it on my skin, it didn’t smell as strong or bad. After a week or two I noticed a little bit of improvement in my skin and acnespots but nothing more after that. While using it, my skin felt more tight and less hydrated. I also started breaking out, I thought it might be a purge but the longer I used it, the more breakouts I got. I think it can be a good product for some but my skin apparently can’t handle it.

    E
    Emery I.
    Good serum

    Good serum that absorbs quickly

    S
    Sloane K.

    It smells like tuna fish. But it feels good and after I put it on my face it didnt smell anymore. I havent really seen big differences yet but my skin does look glowy

    L
    Lauren-Joy B.
    Good

    Been using this product for a month now and already liking the results

    J
    Jesse B.
    Great product

    10/10!

    P
    Paula-Grace A.

    The Vitamin C 13 serum

    E
    Eliza-Grace Z.
    Nice serum

    I have been using it for a few weeks and it leaves my skin with a nice glow. I was using another brand that oxidised pretty quickly compared to this one. This one keeps the same colour and state as when I got it.

    K
    Kendall C.
    interesting

    The product should be kept cool. As I don't have a separate fridge for my cosmetics, I know it will not last as long. The product as a bit of an off putting smell, which luckily leaves quickly when applied to the skin. not sure if the product does much. But already taking the time with this product to massage the skin is good for your skin.

    C
    Charlotte-Rose B.
    The Vitamin C 13 serum

    Perfect

    A
    Aiden A.
    Not so good

    Used this serum for a while but did not see any changes, i have a feeling it already came slightly oxidized, disappointing.

    C
    Christine-Rose A.

    The Vitamin C 13 serum

    H
    Hailey D.

    The Vitamin C 13 serum

    D
    Dakota P.
    good

    worth a try

    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.

    • US Delivery

      US delivery is typically 7 to 10 business days. Standard shipping is $20 below $50, $10 from $50 to $84.99, and free from $85. 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.