Niacinamide Duo
Close-up of a person applying a Niacinamide Serum to their eye with text highlighting its benefits.
Skincare product with text on how to layer Niacinamide Serum in  routine on a neutral background
Ingredients in Niacinamide Serum
Niacinamide Serum being applied to skin, accompanied by usage instructions.
Before and after comparison of a person's face with acne on the left and clear skin on the right.
Model with Niacinamide Serum on her face
Model with Niacinamide Bottle

Niacinamide Serum Duo | The INKEY List

Helps visibly reduce excess oil, blemishes and redness

4.5
Rated 4.5 out of 5 stars
4.5 Stars (672 Reviews)
€19,00 €20,00 / 2 full-size products

Free Deluxe Mini Sample* Claim at cart

What you get: A lightweight, hard-working serum for glowing skin. Powered by Niacinamide for calmer and more even looking complexion. 

Why it works: 10% Niacinamide reduces the appearances of excess oil, blemishes and redness. Hyaluronic Acid hydrates and soothes skin.

How it feels: Lightweight and layers easily with skincare, spf and makeup.

When to use: Use AM/PM, after cleansing and applying your hydrator. Follow with moisturiser, and SPF in the AM.


 This duo includes: 2x Niacinamide Serums (30ml)

Suitable for:

  • All skin types
  • Sensitive skin
  • Pregnancy & breastfeeding

Targets:

  • Excess oil
  • Redness
  • Breakouts & blemishes

Awards & Features

Cosmopolitan Award
Glamour Feature

Shipping info

Standard EU Tracked Shipping

  • €5.95**
  • FREE on your first order & over €45**
  • (2-5 business days*)

**The following countries are subject to increased Standard Tracked Shipping rates and increased FREE shipping thresholds.

  • €6.95 - Denmark, Finland, Switzerland, Estonia, Luxembourg - FREE on your first order & over €45
  • €8.95 - Spain, Portugal, Greece, Sweden, Croatia, Bulgaria, Romania - FREE on your first order & over €55
  • €11.95 - Malta, Cyprus, Iceland, Serbia, North Macedonia, Bosnia & Herzegovina, Monaco - FREE on your first order & over €65.

Express EU Tracked Shipping

  • €11.95
  • (up to 4 business days*, if ordered before 4pm CET on business days) 

Tariff or duties

  • Orders with EU shipping destinations won't be subject to any tariff or duties, however please note that there are a small number of EU and European territories that still require tariffs and duties that will need to be covered by the customer.

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4.5
Rated 4.5 out of 5 stars
Based on 672 reviews
Total 5 star reviews: 486 Total 4 star reviews: 117 Total 3 star reviews: 37 Total 2 star reviews: 11 Total 1 star reviews: 21
Reviews Summary
Customers say this serum has a lightweight, silky texture that absorbs quickly into skin. Many reviews mention reduced oiliness and minimized pores with regular use. The product receives praise for its gentle formula, with users noting improvements in skin texture and tone over time. While most find it effective for their daily routines, some mention it can feel tacky or may not suit very sensitive skin. Frequent users appreciate its consistency and report becoming repeat purchasers.
672 reviews
  • Irene F.
    Verified Buyer
    Reviewing
    Niacinamide Serum
    I recommend this product
    Age Range 35 - 44
    Skin Type Normal
    Skin Concerns Breakouts, Texture, Hyperpigmentation, Acne Scars, Dryness
    Rated 4 out of 5 stars
    4 days ago
    Good

    It feels tacky on my skin. But it does deliver.

  • Gaëlle V. P.
    Verified Buyer
    Reviewing
    Niacinamide Serum
    I recommend this product
    Age Range 25 - 34
    Skin Type Combination
    Skin Concerns Breakouts, Acne Scars
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    1 week ago
    Absolute staple

    I’ve repurchased this serum consistently over the last 4 years. Initially it was to control my acne breakouts, which I now rarely get, but when I try to phase this out, always one or a few little pimples will try to pop up. Since then I keep at least two backups!

  • Bobbie K.
    Verified Buyer
    Reviewing
    Niacinamide Serum
    I recommend this product
    Age Range 18 - 24
    Skin Type Combination
    Skin Concerns Dryness, Fine Lines and Wrinkles, Blackheads, Dehydration
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    1 week ago
    Niacinamide

    LOVE