SkincareSafety Guide

Skin

Understand your skin type, tone, and what your skin is doing.

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Start here

Skin typesThe main skin types and how they differ.Find your skin typeA practical identification guide.What different skin types look likeVisual differences between common skin types.

Common skin questions

Oily skinWhat oily skin means and how to read it.Skin type changesHow skin type can shift over time.Skin type and ageHow visible aging differs by skin type.
Not sure where to start?Use the skin-type guide before choosing routines or ingredients.

Concerns

Start from a skin problem or visible change.

View concern guides

Oil and acne

Why oily skin happensThe main drivers behind excess oil.Oily skin and acneHow oil can contribute to breakouts.Can oily skin cause acne?A direct answer to the oil-acne link.

Changes and warning signs

Stress and oily skinHow stress may affect oiliness.Dehydration and oilinessWhy skin can feel oily and dehydrated.Skin cancer signsVisual signs that need professional attention.
Looking for a solution?Start with what oily skin actually needs before adding stronger products.

Ingredients

Understand what ingredients do and whether they fit your skin.

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Explore ingredients

NiacinamideA practical ingredient overview.Vitamin C serumWho can use vitamin C and when to be careful.RetinolHow retinol fits different skin types.

Use safely

Salicylic acidWhere this acne-focused ingredient fits.Niacinamide for all skin typesSuitability across skin types.Ingredient comparisonsUse comparisons to avoid mismatched decisions.
Can my skin use this?Browse compatibility questions before adding a new active.

Routines

Turn skin information into daily decisions.

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Daily basics

Does every skin type need moisturizer?A basic routine decision.Does every skin type need sunscreen?Where SPF fits in daily care.What oily skin needsA simple care direction for oily skin.

Adjust over time

Skin changes with ageWhen your routine may need to change.Seasonal skin changesHow weather affects skin behavior.Korean skincare approachWhat is useful beneath the trend.
Starting from scratch?Begin with moisturizer, sunscreen, and one skin-specific need.

Products

A small selection of skincare products recommended by OuterDerm for simple, effective everyday routines.

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Recommended picks

Daily SunscreenDaily UV protection that has to be wearable enough to stick with.Azelaic AcidA focused 10% azelaic acid when uneven tone or blemish marks are the concern.Gentle CleanserComfortable cleansing when tight or squeaky skin is a warning sign.
Not sure where to start?Browse three carefully selected essentials, then ask on WhatsApp before you order.

Learn

Go deeper into skin science, myths, evidence, and safety.

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Hazardous ingredients

Safety hubStart with mercury, steroids, PPD and other hazardous substances.Ingredient safety indexBrowse Phase 1 and Phase 2 hazardous ingredients.Mercury in whitening creamsLabel names, Punjab alerts, and what to do now.

Product literacy

Product literacy hubHow to read labels, claims, and INCI lists before you buy.How to read an ingredient labelINCI order, Parfum, and missing-list red flags.Fragrance-free vs unscentedHow to verify a fragrance-free claim on the ingredient list.How to choose sunscreenBroad spectrum, wearability, and a readable pack — not a fairness claim.

Skin science

Skin color geneticsHow inherited traits shape skin color.Skin color typesHow skin tone is commonly grouped.Are skin types genetic?What genetics can and cannot explain.

Evidence and myths

Can all skin types tan?Tanning, risk, and skin type.Is oily skin good or bad?A balanced view of oily skin.Why Korean skin looks flawlessTrend claims translated into practical basics.
Want the evidence layer?Use why-guides when you want causes, mechanisms, and context.

Products & Formulation

Is The Ordinary Niacinamide a Serum?

The Ordinary Niacinamide 10% + Zinc 1% is one of the most popular skincare products on the market. But is it a serum? Yes - and understanding what that means helps you use it correctly.

The Ordinary Niacinamide 10% + Zinc 1% is sold in a dropper bottle with a liquid consistency. It's clearly a serum, but the question is a good one: does it act like one?

Understanding what makes this product a serum helps you know how to use it - and what not to expect from it.

Is The Ordinary Niacinamide actually a serum?

Think of a serum like a concentrated shot of active ingredients. The Ordinary's niacinamide is exactly that - a high concentration of niacinamide and zinc in a lightweight, fast-absorbing format.

Quick answerYes, The Ordinary Niacinamide 10% + Zinc 1% is a serum.

Medically reviewed by Dermatology reviewer · Updated Jul 18, 2026 · 5 min read

The Ordinary Niacinamide 10% + Zinc 1% serum bottle
Product TypeSerum
Concentration10% niacinamide + 1% zinc PCA
TextureWatery gel
ApplicationAfter cleansing, before moisturizer
Best ForOily, acne-prone, and combination skin

Key answer

Yes

The Ordinary Niacinamide 10% + Zinc 1% is a serum, designed to deliver high-concentration active ingredients in a lightweight, fast-absorbing format.

Evidence
Moderate - Yes, it's definitively a serum
Best for
Anyone using or considering The Ordinary Niacinamide; Those new to skincare serums
Limitation
Those looking for a moisturizer

See what the evidence shows

Short version

Story in brief

The Ordinary Niacinamide 10% + Zinc 1% is a water-based serum with a lightweight, gel-like texture. It's designed to deliver a high concentration of niacinamide (10%) along with zinc PCA, a form of zinc that helps regulate sebum and has antimicrobial properties.

As a serum, it's meant to be applied after cleansing and before moisturizer. The lightweight texture allows the active ingredients to penetrate the skin effectively, while the gel base provides a smooth, fast-absorbing experience. It's not a moisturizer, so it should be followed with a separate moisturizing product.

The 10% concentration is a treatment-level amount of niacinamide. This makes the serum a targeted treatment for specific concerns like oiliness, blemishes, and uneven texture, rather than a general skincare product.

Mental model

Visual explanation

Evidence

What the evidence shows

The Ordinary Niacinamide is a treatment serum, not a moisturizer or a cleanser. It's meant to deliver a high concentration of niacinamide to the skin and should be used as part of a complete routine.

  • Looking for a moisturizer?

    This is a serum, not a moisturizer.

  • Want to target oil and blemishes?

    This serum is an excellent choice.

  • Need to layer with other products?

    Apply this serum before moisturizer.

Use this section to decide

Does this advice apply to me?

Find the concern or goal closest to yours, then use the fit signal to decide how much weight to give this guide.
Strong fit means the advice is central to that goal.Depends means formula, tolerance, or context matters more.Use caution means do not treat it as the main answer.

  • If your goal is

    Product typeUsually relevant
    Fit signal
    Often useful

    Serum

  • If your goal is

    ConcentrationUse caution
    Fit signal
    Limited evidence

    10% niacinamide + 1% zinc

  • If your goal is

    TextureUse caution
    Fit signal
    Limited evidence

    Watery gel

  • If your goal is

    ApplicationUsually relevant
    Fit signal
    Often useful

    After cleansing, before moisturizer

Practical use

How to use it

  1. Cleanse

    Start with a clean face to ensure the serum can penetrate effectively.

  2. Apply the serum

    Dispense a few drops and apply to the entire face, avoiding the eye area.

  3. Wait

    Allow the serum to absorb for a minute or two before the next step.

  4. Moisturize

    Follow with a moisturizer to lock in hydration and support the barrier.

  5. Sunscreen (AM)

    In the morning, finish with sunscreen to protect the skin.

Safety

Side effects and cautions

  • Using the serum without moisturizer

    The serum is not a moisturizer. Always follow with a moisturizer.

  • Using too much product

    A few drops are enough for the entire face. Using more doesn't give better results.

  • Expecting it to feel like a moisturizer

    It's a lightweight serum. It will feel watery and absorb quickly.

Fit

Who should be careful

  • Those looking for a moisturizer

Worth noting

Small details that can change the answer

  • Serum Definition. Serums are lightweight products with high concentrations of active ingredients.
  • Product Classification. The Ordinary Niacinamide fits the serum classification perfectly.
  • Texture Description. It has a water-based, slightly gel-like consistency.
  • Concentration Level. 10% niacinamide is a high, treatment-level concentration.

The Ordinary Niacinamide 10% + Zinc 1% is a serum.

Serums are lightweight, fast-absorbing products with high concentrations of active ingredients.

It should be used after cleansing and before moisturizer.

A few drops are enough for the entire face.

Always follow with moisturizer - the serum isn't a moisturizer.

Definition

What makes a skincare product a serum?

Serums are skincare products designed to deliver concentrated active ingredients to the skin. They typically have a lightweight, water-based texture that allows for fast absorption and high concentrations of active ingredients.

  • Lightweight, fast-absorbing consistency
  • High concentration of active ingredients
  • Apply after cleansing, before moisturizer
  • Target specific skin concerns
  • Typically use a small amount (a few drops)

Explanation

Why The Ordinary Niacinamide qualifies as a serum

The Ordinary Niacinamide 10% + Zinc 1% meets all the criteria for a serum. It has a watery, gel-like texture that absorbs quickly. It contains a high concentration (10%) of niacinamide, an active ingredient. It's designed to be applied after cleansing and before moisturizer. And it targets specific concerns: oiliness, blemishes, and textural irregularities.

Benefits

Benefits of using a serum vs. other forms

Using niacinamide as a serum offers several advantages over other product forms.

  • Higher concentration of active ingredients for more noticeable results
  • Better penetration into the skin due to lightweight texture
  • Can be layered with other products in a routine
  • Fast-absorbing so it doesn't feel heavy on the skin
  • Allows for targeted treatment of specific concerns

Questions

Frequently asked questions

Is The Ordinary Niacinamide a serum or a moisturizer?

It's a serum, not a moisturizer. It should be followed with a moisturizer.

Can I use The Ordinary Niacinamide with other serums?

Yes, but introduce new products gradually. It can be used with other water-based serums.

How often should I use The Ordinary Niacinamide serum?

Most people use it once or twice daily. Some may need to start with less frequent use.

Should I apply moisturizer before or after The Ordinary Niacinamide?

Apply the serum first, let it absorb, then apply moisturizer.