25% OFF EVERYTHING + FREE DELIVERY

Get an extra 10% off* over £30 with code SURPRISE10

Bestselling Intro Routines now 35% OFF! Shop Now >

Niacinamide Duo Shot
How to layer Niacinamide Serum in your routine
Before & After of customer using Niacinamide Serum
Apply pea sized amount
Apply AM & PM
Key ingredients in Niacinamide Serum
Model with Niacinamide Serum
Model with Niacinamide Serum on her face

Niacinamide Serum Duo | The INKEY List

Power packed duo for reducing excess oil, blemishes and redness

4.5
Rated 4.5 out of 5 stars
4.5 Stars (624 Reviews)
£14.00 £20.00 / 2 full-size products

Extra 10% off* over £30 with code SURPRISE10

Loading…

Introducing our dynamic duo of lightweight Niacinamide Serums, power-packed and effortlessly layered into your skincare routine to combat excess oil and redness.

Formulated with 10% Niacinamide, this naturally occurring B3 vitamin helps to effectively reduce excess oil, blemishes and redness. This anti-blemish serum has a thin consistency and is formulated with 1% Hyaluronic Acid for added hydration and effective delivery, leaving your skin smoother and radiant.

This duo includes: 2x Niacinamide Serums (15ml)

Suitable for:

  • All Skin Types
  • Sensitive Skin

Targets:

  • Excess Oil
  • Redness
  • Breakouts & Blemishes

Proud to be:

  • Carbon Net-Zero
  • B-Corp
  • Cruelty Free
  • Recyclable
  • Travel Size
  • Gluten Free
  • Fragrance Free

Awards & Features

Cosmopolitan Award
Stylist Magazine Award
Glamour Award

Delivery info

Standard tracked delivery (Royal Mail)

£3.99
(2-5 working days*)

FREE standard tracked delivery on orders over £30

Express tracked delivery (Royal Mail)

£5.95 (Up to 2 working days if ordered before 4pm, excluding weekends*)

FREE express tracked delivery on orders £50+

*Find out more about Delivery here.

Track the status of your parcel with
our trusted couriers

Still not sure?

Take our Skin Quiz, choose your personalised routine and get FREE products.

Take The Quiz

20% OFF sets! Limited time only.

  • Before and after comparison
    Zaklina uses Fulvic Acid Cleanser with Niacinamide Serum, Tranexamic Acid Serum and Vitamin BCE Moisturiser. “You took my skin (and face) to another level! Thank you INKEY List.”

    Zaklina

  • Before and after comparison
    "This is after just a couple of months using The INKEY List... I couldn't not show you. I had tried everything before and nothing ever helped!"

    Tina C

  • Before and after comparison

    Aysu started using Niacinamide Serum in her routine to improve her skin. After 2 months of use, her redness and breakouts have reduced.


    Aysu

  • Before and after comparison
    Mia is a loyal INKEY customer, using Salicylic Acid Cleanser in her routine along with Succinic Acid Treatment, Mandelic Acid Treatment, Retinol Serum and Niacinamide Serum.

    Mia M

  • Before and after comparison
    Shannon shared her myINKEY skin journey with her TikTok followers. She used Omega Water Cream AM and PM to improve her skin barrier, alongside Beta Hydroxy Acid Serum, Niacinamide Serum, Salicylic Acid Cleanser and Succinic Acid Treatment to tackle her breakouts.

    Shannon

4.5
Rated 4.5 out of 5 stars
Based on 624 reviews
Total 5 star reviews: 445 Total 4 star reviews: 112 Total 3 star reviews: 33 Total 2 star reviews: 12 Total 1 star reviews: 22
624 reviews
  • Ann Marie N.
    Verified Buyer
    Niacinamide Serum
    Reviewing
    Niacinamide Serum
    I do not recommend this product
    Age Range 65+
    Skin Type Combination
    Skin Concerns Oiliness
    Sensitive Skin Friendly? No
    Rated 1 out of 5 stars
    2 days ago
    Not impressed

    I have been using this product for some time now and found it helped with my combination skin. I ordered 2 bottles of Niacinamide Serum, expecting to receive the usual product, but the colour was a brownish colour, where it was normally white/clear and the smell from both bottles was like old paint. I complained about this and eventually received replacements which turned out to be exactly the same. Not impressed!

    TI Profile picture for The INKEY List UK
    The INKEY List UK
    Yesterday

    Hello Ann Marie,

    Thank you for taking the time to share your feedback on our Niacinamide Serum. We sincerely apologize for the disappointing experience you've had with the product, and regret the inconvenience caused by receiving discolored serums. We take great pride in our commitment to quality, and this is certainly not the experience we want any of our customers to have. Please do reach out to our Customer Experience Team, as we would love the opportunity to investigate this issue further, understand what may have caused the discrepancy, and find a resolution that meets your expectations 🖤

  • Malak M.
    Verified Buyer
    Niacinamide Serum
    Reviewing
    Niacinamide Serum
    I recommend this product
    Age Range 18 - 24
    Skin Type Normal
    Skin Concerns Hyperpigmentation, Acne Scars, Under Eye Circles, Breakouts, Texture
    Sensitive Skin Friendly? Yes
    Rated 4 out of 5 stars
    2 days ago
    Great for glow

    Love this product, I tried this product vs the glow recipe and it honestly had the same affect love both anyways, this one is just cheaper

  • patricia T.
    Verified Buyer
    Niacinamide Serum
    Reviewing
    Niacinamide Serum
    I recommend this product
    Age Range 45 - 54
    Skin Type Combination
    Skin Concerns Redness, Dryness, Texture, Fine Lines and Wrinkles, Hyperpigmentation
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    1 week ago
    Excellent pour unifier mon teint et les rougeurs

    Peau mixte à tendance déshydratée. Il est parfais pour moi

Reviews LoadedReviews Added