Close-up of a person's eye with text highlighting 20% Niacinamide Serum benefits

Close-up of a person's eye with text claiming clinical proven oil control for 8 hours using 20% Niacinamide Serum

Text overlay on a skincare product showing steps how layer 20% Niacinamide Serum in a routine.

Advertisement showing a close-up of a person's face with text about 20% Niacinamide Serum effectiveness in a clinical study

Product with text detailing i20% Niacinamide Serum ingredients and benefits on a white background

Instructions on how to use a s20% Niacinamide Serum with text and close-up of finger.

Before and after comparison of a person's face with visible skin texture changes.

Skin /
Serums /
20% Niacinamide Serum

20% Niacinamide Serum

Name: 20% Niacinamide Serum
Brand: The INKEY List USA
SKU: IF043UE
Price: 14.63 USD
Availability: InStock
Rating: 4.2 (300 reviews)

Help balance excess oil, improve skin texture and reduce the appearance of pore size.

4.2

Rated 4.2 out of 5 stars

4.2 Stars (300 Reviews)

$14.63 ~~$19.50~~ / 30ml

or $13.65

Free shipping on all orders

Loading…

Worth 70 Points

What you get: A lightweight, non-sticky serum with 20% Niacinamide to help control oil, smooth texture, and visibly reduce the look of pores.

Why it works: 20% Niacinamide helps reduce oil and tighten the look of pores. Zinc PCA tackles sebum buildup. Squalane supports and protects the skin barrier.

How it feels: Lightweight, non-sticky and layers easily.

When to use: Use this niacinamide serum for oily skin AM and PM, after cleansing and applying your hydrator. Follow with moisturizer, and SPF in the AM.

Suitable for:

Oily skin
Pregnancy & breastfeeding

Targets:

Excess oil all over the face
Acne & blemishes
Enlarged pores

How to Use

Use in your AM and PM routine. After cleansing and hydrating, apply a pea-sized amount of this oil control serum to face and neck.

Follow with

Moisturizer

SPF in your AM routine.

INKEY Tip

Don’t mix with Vitamin C - alternate use on different days.

This is best for full-face oiliness and visible pores.

If you’ve got combo skin or just a shiny t-zone, try the 10% Niaciniamide Serum instead.

Heads up

When adding new products to your skincare routine, we always recommend patch testing. Learn more here.

Storage

Store in a cool, dry place (15–25 °C), away from direct sunlight. Avoid direct contact with eyes. For external use only. Keep out of reach of children.

Ingredients

20% Niacinamide: Our highest inclusion. Reduces the appearances of excess oil, blemishes and redness.
0.5% Zinc PCA: Targets bumps and texture caused by sebum build-up.
3% Squalane: Helps to protect the skin’s barrier.

Aqua (Water), Niacinamide, Butylene Glycol, Squalane, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Glycerin, Phenoxyethanol, Benzyl Alcohol, Ammonium Acryloyldimethyltaurate/VP Copolymer, Zinc PCA, Polysorbate 60, Ethylhexylglycerin, Dehydroacetic Acid, Sorbitan Isostearate, Trisodium Ethylenediamine Disuccinate.

Developed with Dermatologists

"As a dermatologoist I enjoyed giving my inpout on this particualr product because excess oil affects so many people, it can lead to clogged pores, enlarged pores, breakouts and even textural changes. This particular formulation includes Niacinmide at 20%, which is the highest possible inclusion of this ingredient and it will help to control excess oil, improve texture and reduce the apperance of pore size".

- Dr Adeline Kikam. Dermatologist & Doctor, @brownskinderm

Learn more about the SuperSolutions range

FAQs

CAN I USE THIS NIACINAMIDE FOR OILY SKIN IN THE AM OR PM? Both! It’s safe and effective morning and night.

CAN I USE IT LONG TERM? Yes.

HOW OFTEN SHOULD I USE IT? Daily use is ideal both AM/ PM. Consistency = results.

IS IT GOOD FOR DRY SKIN TOO? Yes! It helps balance oil production, making it great for both dry and oily skin types.

WHAT’S THE % OF NIACINAMIDE? 20%

CAN I LAYER IT? Layer with your usual skincare routine. Keep exfoliating products containing AHAs and BHAs in your PM routine.

CAN I USE THIS WITH RETINOL? We recommend using our lower % Niacinamide, 10% Niaciniamide Serum, with Retinol. If you're using Retinol at night, use this in the AM.

CAN I USE THIS WITH VITAMIN C? Yes - just alternate use.

PH LEVEL? 5-6

HOW LONG UNTIL I SEE RESULTS? Give it 4–6 weeks of consistent use. More isn’t always better - overuse can cause irritation.

WHY DOES IT LEAVE A WHITE FILM? You’re using too much. Use less and follow with your serum or moisturiser right away!

IS THIS SAFE FOR THOSE WHO ARE PREGNANT OR BREASTFEEDING? Yes.

IS IT VEGAN? Yes! Certified by The Vegan Society. No animal derivatives.

CAN I USE IT WITH PRESCRIPTION MEDICATION? Check with your doctor first.

Inkey Decoded

Skincare can be confusing.

So we cut the BS, and get straight to the point. We simplify the INCI list - commonly known as the ingredients list, that every skincare product has. That’s also where we get our name from. We’re The INKEY List - here to help you get better skin with real knowledge and formulas that deliver. No BS. No hype. Just effective, science-backed skincare that does what it says it will. We show you what your skin needs, not what’s trending. Whether you’re new to skincare or have a solid routine, we’ve always got your back with innovation, education and clinically-proven results.

All at a price that makes sense.

We are B CORP. Our products are formulated with responsibly sourced ingredients, and packaged with 100% recyclable materials. Skin needs love, but so does our planet.

Carbon Net-Zero. All our emissions are offset annually through planet friendly projects with a focus on education.

Approved under the Cruelty Free International Leaping Bunny programme.

100% of our packaging is recyclable. Learn how to recycle your INKEY List products.

Certified by The Vegan Society

This product is;

Dermalogically tested

Clinically tested

Fragrance-free

Gluten-free

Pregnancy & Breastfeeding safe

Clinically proven to control oil for 8 hours.*

*DISCLAIMER: Independent clinical study of 20 people.
Immediately reduces excess oil by up to 60%.*

*DISCLAIMER: Independent clinical study of 20 people.
92% agreed pores looked and feel smoother after 3 days.*

*DISCLAIMER: 4 week independent consumer trial of 50 people with oily skin.
91% agreed the serum improved the texture and evenness of their skin after 3 days.*

*DISCLAIMER: 4 week independent consumer trial of 50 people with oily skin.
92% agreed skin felt fresh, balanced and less shiny after 3 days.*

*DISCLAIMER: 4 week independent consumer trial of 50 people with oily skin.

Shipping info

Standard tracked shipping

FREE on all orders
(2-5 business days*)

Express tracked shipping

$15
(2-3 business days*, when ordered before 3pm EST)

*Find out more about shipping here.

Track the status of your parcel with
our trusted couriers

Should I be using 20% Niacinamide?

Supersolution

Have you tried?

Supersolution

20% Niacinamide Serum

Suitable for...

People who have excess oil, all over the face rather than just in the t-zone, causing oil related concerns such as enlarged, visible pores and textured skin.

$14.63 / 30ml

or

Have you tried?

Niacinamide Serum

Suitable for...

People who have combination skin or t-zone oiliness, or do not have active acne or breakouts.

$7.88 / 30ml

More Info

More Blogs

Still not sure?

Take our Skin Quiz and choose your personalised routine and free products.

Take The Quiz

4.2

Rated 4.2 out of 5 stars

Based on 300 reviews

Total 5 star reviews: 158 Total 4 star reviews: 77 Total 3 star reviews: 40 Total 2 star reviews: 13 Total 1 star reviews: 12

Reviews Summary

Customers say this serum helps manage oily skin throughout the day. Many reviews mention reduced shine, especially in the T-zone area. While some note a white residue when applying, most find it works well under makeup. Reviews are mixed on pore appearance, with some reporting visible improvements while others see minimal change. Common feedback includes the need to shake well before use and concerns about packaging design. Users with combination skin particularly appreciate its targeted application for oily areas.

Write a Review (Opens in a new window)

300 reviews

Sort

SARA S.
Verified Buyer
Age Range 25 - 34
Skin Type Combination
Skin Concerns Dryness, Blackheads, Fine Lines and Wrinkles
Sensitive Skin Friendly? Yes
Rated 3 out of 5 stars
1 month ago
Great results, but a bit sticky
I like how this serum helps control oil and smooth my skin, but the texture is a little sticky. If you don’t layer it properly, it can pill a bit. Still, it works really well once you find the right routine!
Was this helpful?
Heidi K.
Verified Buyer
I recommend this product
Age Range 55 - 64
Skin Type Oily
Skin Concerns Oiliness, Breakouts
Sensitive Skin Friendly? Yes
Rated 5 out of 5 stars
2 months ago
This stuff works!
I have struggled with oily skin my entire life. At 57 years of age, I’m thrilled to finally have a product that greatly reduces oiliness and shine but still leaves my skin soft and dewy. This is a game changer!
Was this helpful?
Chamoosing K.
Verified Reviewer
I recommend this product
Age Range 25 - 34
Skin Type Combination
Skin Concerns Acne Scars, Blackheads, Hyperpigmentation, Breakouts
Sensitive Skin Friendly? Yes
Rated 5 out of 5 stars
2 months ago
Blemishes gone...
Been using this serum for 2 weeks, all me blemishes are gone, will be repurchasing :)
Was this helpful?

Shop Related Categories

Anti Aging Skincare Sets Moisturizers

Your Cart

20% Niacinamide Serum

Suitable for:

Targets:

How to Use

Ingredients

Developed with Dermatologists

FAQs

Inkey Decoded

Shipping info

Salicylic Acid Cleanser - 150ml

360° Acne Clearing Serum

Omega Water Cream - 50ml

Beta Hydroxy Acid (BHA) Serum

Deep Cleanse Duo