Introduction

If you’ve spent even a few minutes researching skincare for oily skin, acne marks, or enlarged pores, chances are you’ve already come across The Ordinary Niacinamide 10% + Zinc 1%.

This serum has become one of the most talked-about budget skincare products online, especially among people dealing with acne-prone or combination skin. But after testing it myself for several weeks, I realized something important:

This product works really well for some people — and not so well for others.

From my experience, the results depend heavily on your skin type, how often you use it, and what products you combine it with.

When I tested this serum consistently, I noticed improvements in oil control, smoother skin texture, and reduced post-acne marks. However, I also noticed that overusing it could sometimes leave the skin slightly dry or irritated.

In this detailed review, I’ll cover:

My real experience using it
Key ingredients explained
Pros and cons
Who should buy it
Common mistakes people make
Comparisons with similar niacinamide serums
Whether it’s still worth buying in 2026

[Image: The Ordinary Niacinamide serum bottle on skincare shelf]

Title: The Ordinary Niacinamide Serum Packaging
Alt Text: The Ordinary Niacinamide 10 percent Zinc 1 percent serum bottle
Description: The popular niacinamide serum designed for oily, acne-prone, and textured skin.

What Is The Ordinary Niacinamide 10% + Zinc 1%?

The Ordinary Niacinamide 10% + Zinc 1% is a water-based serum formulated to help reduce excess oil, improve skin texture, and minimize the appearance of blemishes.

The formula combines:

10% Niacinamide (Vitamin B3)
1% Zinc PCA

The serum is mainly marketed toward:

Oily skin
Acne-prone skin
Congested pores
Uneven texture
Post-acne marks

It’s also fragrance-free, silicone-free, alcohol-free, vegan, and cruelty-free. (Ulta Beauty)

One reason this product became so popular is its affordability. Compared to many premium niacinamide serums, it costs much less while still offering solid ingredient quality.

Key Ingredients Explained

Niacinamide (Vitamin B3)

Niacinamide is honestly one of the most versatile skincare ingredients available today.

From my experience, it’s especially useful because it targets multiple skin concerns at once.

Benefits include:

Helps regulate oil production
Supports the skin barrier
Improves uneven skin tone
Reduces redness
Helps fade acne marks
Improves texture over time

Several dermatologists also recommend niacinamide for pore appearance and barrier support. (Vogue)

Zinc PCA

Zinc PCA mainly helps with oil control and calming inflammation.

When I tested the serum during hot weather, I noticed my T-zone became less shiny after regular use.

Zinc may also help reduce the appearance of active breakouts, especially when paired with niacinamide.

[Image: Serum texture applied on skin]

Title: The Ordinary Niacinamide Serum Texture
Alt Text: Texture of The Ordinary Niacinamide 10 percent serum on skin
Description: Lightweight serum consistency that absorbs quickly into the skin.

My Experience Testing The Ordinary Niacinamide Serum

I tested this serum for several weeks in both morning and nighttime routines.

First Impressions

The texture feels lightweight but slightly thicker than some other water-based serums.

It spreads easily, although I noticed it can become foamy or pill if you apply too much product.

The serum absorbs fairly quickly, but layering matters a lot.

Week 1 Results

During the first week, I noticed:

Slight reduction in oiliness
Smoother skin texture
Less midday shine
No major irritation

However, I also noticed that applying too much caused slight tightness around dry areas.

That’s why I’d recommend starting slowly, especially if you have sensitive skin.

Week 3–4 Results

After more consistent usage, I noticed:

Acne marks looked lighter
Skin texture felt smoother
Pores appeared less noticeable
Oil production stayed more balanced

The biggest improvement for me was honestly the smoother texture.

My skin felt more refined overall without feeling stripped.

Does It Help Acne?

This is where expectations matter.

The serum does NOT work like a strong acne treatment such as benzoyl peroxide or salicylic acid.

Instead, it helps indirectly by:

Reducing excess oil
Supporting skin barrier health
Calming inflammation
Improving post-acne marks

If you have mild acne or oily skin, this serum can definitely help.

But if you have severe cystic acne, you’ll probably need stronger treatments alongside it.

Pros and Cons

Pros

Affordable price
Excellent for oily skin
Helps reduce shine
Improves texture gradually
Lightweight formula
Fragrance-free
Works well for acne marks
Beginner-friendly ingredient

Cons

Can irritate sensitive skin
10% niacinamide may feel too strong for some users
Can pill under certain moisturizers
Not deeply hydrating
Results take consistency

Some users on Reddit also reported irritation or breakouts, especially with sensitive skin or overuse. (Reddit)

At the same time, many users experienced clearer skin and better oil control after regular use. (Reddit)

This honestly shows how individual skincare can be.

[Image: Before and after oily skin texture improvement]

Title: Niacinamide Serum Skin Texture Results
Alt Text: Improvement in skin texture after using niacinamide serum
Description: Regular use may help improve oiliness and uneven skin texture over time.

Who Should Buy This Serum?

From my experience, this serum works best for:

People with Oily Skin

If your skin gets shiny quickly, this can help balance oil production.

Acne-Prone Skin Types

It’s especially useful for mild acne and post-acne marks.

Beginners Building a Skincare Routine

Because it’s affordable and simple, it’s a solid beginner serum.

People with Enlarged Pores

Niacinamide may help reduce the appearance of pores over time through better oil regulation.

Who Should Avoid It?

This serum may NOT be ideal if:

You have extremely sensitive skin
Your skin barrier is damaged
You react badly to high niacinamide percentages
You already use multiple strong active ingredients

Some dermatology discussions suggest that lower niacinamide concentrations around 5% may work better for sensitive skin types. (Reddit)

How to Use The Ordinary Niacinamide Correctly

This part honestly matters a lot.

A lot of people damage their results simply by layering products incorrectly.

Best Routine Order

Cleanser
Toner (optional)
Niacinamide serum
Moisturizer
Sunscreen (morning only)

How Often Should You Use It?

If you’re a beginner:

Start 3–4 times weekly
Then increase gradually

If your skin tolerates it well, daily use is usually fine.

What NOT to Mix With It

The brand advises avoiding direct Vitamin C in the same routine. (Ulta Beauty)

Personally, I also wouldn’t combine it with too many strong acids initially.

Comparison With Similar Serums

Feature	The Ordinary Niacinamide	Premium Niacinamide Serums
Price	Budget-friendly	Expensive
Texture	Slightly tacky	Usually smoother
Oil Control	Excellent	Good
Sensitive Skin	Mixed results	Often gentler
Fragrance-Free	Yes	Usually
Beginner Friendly	Mostly yes	Yes

In my opinion, The Ordinary gives outstanding value for the price, but premium formulas often feel more elegant and less irritating.

Is It Good for Dry Skin?

This question comes up constantly.

From my experience, dry skin users can still use this serum, but hydration is essential afterward.

Some dry skin users reported positive experiences, while others experienced peeling or irritation. (YouTube)

If your skin is dry:

Use a strong moisturizer afterward
Avoid overusing it
Start slowly

Realistic Expectations

One thing I appreciated after testing this product is that it doesn’t promise unrealistic overnight results.

You’ll likely notice:

Within 1 Week

Slight oil reduction
Smoother feel

Within 3–4 Weeks

Better texture
Reduced congestion
Improved acne marks

After Consistent Long-Term Use

More balanced skin overall

Consistency matters far more than using huge amounts.

[Image: Minimal skincare routine with niacinamide serum]

Title: Simple Skincare Routine With Niacinamide
Alt Text: Beginner skincare routine using niacinamide serum
Description: A simple skincare routine pairing niacinamide serum with moisturizer and sunscreen.

Practical Tips for Better Results

Use Only 2–3 Drops

More product does NOT mean better results.

Too much can cause pilling or irritation.

Pair It With Moisturizer

This serum works better when your skin barrier stays hydrated.

Always Wear Sunscreen

Brightening products work best when your skin is protected from UV damage.

Don’t Expect Overnight Results

Niacinamide is more of a gradual-improvement ingredient.

Patience matters.

FAQ

Is The Ordinary Niacinamide good for acne?

It can help mild acne and oily skin by reducing excess oil and calming inflammation, but it’s not a prescription acne treatment.

Can I use it every day?

Yes, if your skin tolerates it well. Beginners should start slowly.

Does it help dark spots?

Yes, consistent use may help fade post-acne marks and uneven tone over time.

Is it safe for sensitive skin?

It depends. Some sensitive skin users tolerate it well, while others find 10% niacinamide too strong.

Can I use niacinamide with retinol?

Usually yes, and many people pair them together successfully.

Does it clog pores?

From my experience, it feels lightweight and generally works well for acne-prone skin.

Final Verdict

After testing The Ordinary Niacinamide 10% + Zinc 1% consistently, I understand why it became such a cult-favorite skincare product.

It’s affordable, effective for oily and acne-prone skin, beginner-friendly, and surprisingly versatile for the price.

However, it’s also one of those skincare products where your individual skin type matters a lot.

If you have:

Oily skin
Mild acne
Enlarged pores
Post-acne marks
Texture concerns

…this serum is absolutely worth trying.

But if your skin is extremely sensitive or damaged, you may prefer gentler niacinamide formulas with lower concentrations.

Overall, in my opinion after testing, this is still one of the best budget niacinamide serums you can buy in 2026.