What is Niacinamide?

Niacinamide is a water-soluble form of Vitamin B3 - one of the body's essential B vitamins, found naturally in foods like eggs, fish, and green vegetables. But while your body uses Vitamin B3 in countless biological processes, when niacinamide is applied directly to skin, it works on a very different level: it communicates with your skin cells to regulate oil production, support the skin's barrier, and calm inflammation at the source.

That's what makes it genuinely multi-functional, and genuinely different from most actives on the market. Retinol accelerates cell turnover. Vitamin C brightens. Salicylic Acid exfoliates inside pores. Niacinamide does something more holistic - it essentially teaches your skin to behave better, addressing several concerns at once without the trade-off of irritation or sensitivity.

One thing worth clarifying: niacinamide is not the same as niacin. Niacin is the form of Vitamin B3 that causes the infamous "niacin flush" - redness and tingling when taken in high oral doses. Niacinamide does not cause flushing. It is one of the most well-tolerated skincare actives available, with decades of dermatological research behind it.

How is Niacinamide Different From Other Actives?

The reason niacinamide can do so many things for skin comes down to how it interacts with your cells. Here are the five key actions it performs at a cellular level:

Sebum Regulation

Niacinamide reduces the activity of sebaceous glands - the glands responsible for producing oil. Unlike mattifying primers or blotting papers that absorb oil after it's already on the surface, niacinamide works at the source, reducing how much oil is produced in the first place. The effect builds over consistent use, with most people noticing a visible reduction in shine within 2–4 weeks.

Pore Appearance

Pore size is largely determined by genetics - but excess oil stretches the lining of pores and makes them appear larger than they need to be. By reducing sebum production, niacinamide helps pores return to a more refined appearance over time.

Ceramide Synthesis

This is one of Niacinamide's most underrated benefits. It stimulates the production of ceramides - the lipids that form the "mortar" of your skin barrier. A stronger barrier means better moisture retention, less sensitivity, and more resilience. This is why niacinamide is one of the only oil-control actives that actually improves dry and sensitive skin rather than stripping it.

Anti-Inflammatory Action

Niacinamide calms inflammation at a cellular level - reducing the redness, swelling, and irritation associated with blemishes. This is also why it's a reliable option for skin conditions like rosacea, where inflammation is a persistent concern.

Melanin Transfer Inhibition

Niacinamide inhibits the transfer of melanin (pigment) from melanocytes (the cells that produce pigment) to the surface skin cells. Over time, this reduces the appearance of dark spots, post-blemish marks (post-inflammatory hyperpigmentation), and uneven skin tone.

Suitable for All Skin Types

Unlike many skincare ingredients that come with restrictions, hyaluronic acid is remarkably well-tolerated across all skin types:

Dry Skin: Provides essential moisture without heaviness

Oily Skin: Hydrates without adding oil or clogging pores

Sensitive Skin: Gentle, non-irritating, and naturally occurring

Combination Skin: Balances hydration needs across different zones

Mature Skin: Helps restore lost volume and suppleness

This universal compatibility makes hyaluronic acid an excellent choice for families sharing skincare or anyone unsure about their exact skin type.

Controls Excess Oil and Shine

If oily skin is your primary concern, niacinamide is one of the most effective long-term solutions available. By reducing sebaceous gland activity, it tackles excess oil at the source rather than masking it on the surface. What this means in practice: less shine throughout the day, fewer clogged pores, and makeup that actually lasts. Most people notice a meaningful reduction in oiliness within the first two to four weeks of daily use, with results continuing to improve over the following weeks as the ingredient builds in effect.

It's also worth noting that the "dry out" approach - using harsh, stripping ingredients to combat oil - often backfires, triggering a rebound effect where skin produces even more oil to compensate. Niacinamide doesn't strip. It regulates. The result is a more balanced skin long-term.

Visibly Reduces Acne and Breakouts

Niacinamide works on acne and blemishes on two fronts: it reduces the inflammation that makes existing breakouts red and angry, and it regulates the excess oil that creates the conditions for new breakouts to form. Unlike chemical exfoliants (AHAs, BHAs), it doesn't cause a purging phase - no initial flare-up, no peeling, no downtime. You can start using it daily from day one, even during an active breakout.

This also makes niacinamide the right active to use when your skin is at its most reactive. When skin is inflamed and blemish-prone, that's precisely the moment to reach for niacinamide - not to abandon it in favour of something stronger. Gentle, consistent, and anti-inflammatory is what inflamed skin needs, and niacinamide delivers all three.

Minimizes the Appearance of Pores

Let's be straightforward: you cannot permanently shrink your pores. Pore size is genetic. But you absolutely can make them look smaller - and niacinamide is one of the most effective ingredients for doing so. By regulating the oil that stretches and distends the pore lining, and by improving the overall texture and tone of the surrounding skin, niacinamide creates a visibly smoother, more refined skin surface over time. Most users report noticeable improvement in pore appearance at the 6–8 week mark with consistent daily use.

Evens Skin Tone and Fades Hyperpigmentation

Post-blemish marks. Dark spots left by old breakouts. Patches of uneven tone. Niacinamide addresses all of them by inhibiting the transfer of melanin (pigment) from the cells that produce it to the cells that display it on the skin's surface. The result is a more even, luminous skin tone over time - without the risk of sensitivity that comes with stronger brightening actives like high-concentration Vitamin C or certain exfoliating acids.

This is a slower process than oil control or blemish-calming - expect to see meaningful improvement at around 8–12 weeks of consistent use. But it's a sustained improvement, not a surface-level fix.

Strengthens the Skin Barrier

One of niacinamide's most important (and most underappreciated) benefits is its ability to stimulate ceramide production. Ceramides are the natural lipids that form the "mortar" between your skin cells, keeping moisture in and environmental aggressors out. When your skin barrier is compromised (tight, reactive, sensitive, prone to dryness even if you're also oily), ceramide levels are typically depleted.

Niacinamide helps rebuild that barrier from within. This is why it sits comfortably in routines for sensitive, eczema-prone, and rosacea-prone skin - it's one of the very few actives that addresses blemishes AND barrier health simultaneously, without the trade-off of irritation.

Suitable for All Skin Types

One of Niacinamide's greatest strengths is its versatility. Here's how it works across different skin types:

Oily skin: Regulates sebum at the source, reduces shine and congestion

Combination skin: Targets the oily T-zone while supporting drier areas of the face

Dry skin: Ceramide-boosting action strengthens the barrier and improves moisture retention

Sensitive skin: Anti-inflammatory properties calm reactivity without stripping or irritating

Acne-prone skin: Reduces acne, breakouts and post-blemish marks without purging

Mature skin: Evens tone, reduces the appearance of pores, and supports barrier resilience

Pregnancy / breastfeeding: Vitamin B3 is an essential nutrient during pregnancy — niacinamide applied topically is widely considered safe (always consult your healthcare provider)

How Much to Use

Apply a pea-sized amount to your face and neck. A little goes a long way - you don't need to saturate your skin. With 30ml bottles like INKEY List's 10% Niacinamide Serum, a consistent daily user typically gets around 2–3 months of use per bottle.

When to Use It

Niacinamide can be used morning, evening, or both - it works in AM and PM routines and layers well with most other skincare. For oily and blemish-prone skin, using it twice daily will deliver the fastest and most visible results.

Where It Sits in Your Routine

Apply after cleansing and any hydrating serums (like Hyaluronic Acid), and before your moisturiser. As a general rule: thinnest texture first, thickest last.

Morning vs Evening Application

Morning: Apply your Niacinamide Serum after any hydrating steps and before moisturizer and SPF. In the AM, niacinamide also provides a helpful oil-regulating base under makeup, reducing shine throughout the day.

Evening: If you're also using Retinol, apply niacinamide first. Wait for it to absorb briefly, then apply your Retinol. Niacinamide helps buffer the potential irritation of Retinol - a well-documented and widely used combination.

Key Application Tips

• Apply to slightly damp or dry skin - both work
• Don't rub in aggressively; press gently into skin and let it absorb
• Don't mix it in your palm with other serums - apply each step individually
• Consistency matters more than frequency - daily use at 10% will outperform sporadic use at 20%

Niacinamide and Salicylic Acid - Can You Use Both?

Yes - and this is one of the most effective combinations for oily and acne-prone skin. They work on different mechanisms:

• Salicylic Acid is a BHA (beta hydroxy acid) that penetrates inside the pore lining, dissolving the buildup of dead skin cells and sebum that leads to blackheads and congestion. It works fast and works deep.
• Niacinamide regulates oil production and calms the inflammation that makes blemishes red and persistent. It works at the sebaceous gland level rather than inside the pore.

Used together, they create a comprehensive acne-fighting approach: Salicylic Acid deals with what's already there; niacinamide reduces the conditions that create new breakouts. The easiest way to combine them? Use INKEY List's Salicylic Acid Cleanser as your first step, followed by the 10% Niacinamide Serum as your treatment step. No timing gymnastics required.

Niacinamide and Retinol - Better Together

Niacinamide and Retinol are one of skincare's most powerful duos - and one of the most misunderstood. They are not competing actives. They're complementary:

• Retinol accelerates cell turnover, targeting fine lines, textural concerns, and deep skin ageing
• Niacinamide regulates oil, calms inflammation, and strengthens the barrier

Together, they cover anti-ageing and clarity in a single routine. The key to using them together: apply niacinamide first. It buffers the potential irritation and dryness that Retinol can cause when you're starting out or using a higher strength, making the combination far more tolerable — especially for sensitive skin.

Application order (PM): Cleanse → Niacinamide Serum → Retinol → Moisturizer

Niacinamide and Vitamin C - The Truth

There's a long-standing myth that niacinamide and Vitamin C can't be used together - the concern being that combining them creates a compound called nicotinic acid that causes flushing. This was based on outdated research using highly unstable forms of both ingredients, and is largely considered irrelevant to modern, well-formulated skincare products.

In practice, using INKEY's Niacinamide and Vitamin C products at different points in your routine (morning vs evening, or simply as separate steps) is the most straightforward approach. INKEY's 15% Vitamin C & EGF Serum and the 10% Niacinamide Serum can both feature in the same routine - just don't mix them in your palm and apply them as a cocktail.

Niacinamide and Hyaluronic Acid - The Perfect Pairing

This is INKEY's signature combination, and for good reason. Hyaluronic Acid delivers immediate, lightweight hydration - it works on the surface of skin by drawing moisture in and holding it there. Niacinamide then provides the active treatment step. Used in sequence (HA serum first, niacinamide serum second), they give you hydration AND oil control AND blemish reduction in a routine that takes less than two minutes. Neither ingredient competes with or counteracts the other - they simply do different things, beautifully together.

10% Niacinamide Serum - $10.50 | 30ml

The INKEY List's 10% Niacinamide Serum is where most people should start - and where most people stay. Formulated at 10%, it sits at the concentration sweet spot: high enough to deliver meaningful, clinically validated results for oil control and blemish reduction, gentle enough to use daily on all skin types including sensitive. At $10.50 for 30ml, it's also one of the most accessible effective actives in skincare.

What it contains:

• 10% Niacinamide - the active. Regulates oil, reduces acne and blemishes, refines pore appearance, evens tone
• Hyaluronic Acid - supports hydration so the formula controls oil without leaving skin feeling stripped or tight
• Allantoin - soothes and calms the skin, supporting tolerability
• Squalane (plant-derived from sugarcane) - a lightweight, non-comedogenic emollient that supports the skin barrier without adding heaviness

Product highlights:

• Lightweight, serum texture - layers easily under moisturiser and makeup
• Fragrance-free - suitable for sensitive skin
• Pregnancy and breastfeeding safe
• pH: 6.09 - optimised for niacinamide stability and skin compatibility
• Cruelty-free (Leaping Bunny certified)
• B Corp certified

Note: This formula is NOT vegan (contains a small amount of an egg-derived ingredient).

What customers say (4.5 stars | 737 reviews):

Customers consistently report visible oil control within the first 1–2 weeks, with meaningful blemish reduction by weeks 4–6. It's one of INKEY's most repurchased products - a strong indicator that results are sustained, not just initial.

How to use:

Apply a pea-sized amount to face and neck after cleansing and any hydrating serums. Use morning, evening, or both. Follow with moisturizer.

Shop 10% Niacinamide Serum

Omega Water Cream - $13 | 50ml

If the 10% Niacinamide Serum is your oil-control treatment step, the Omega Water Cream is the perfect final seal - a lightweight, oil-free moisturizer that also contains 5% Niacinamide, creating a complete niacinamide system across your treatment and moisture steps in one routine.

Where most moisturizers designed for oily skin sacrifice hydration for a matte finish, Omega Water Cream refuses the trade-off. Its gel-water texture delivers deep hydration instantly while locking in the results of the niacinamide serum underneath. It's non-comedogenic, absorbs quickly, and leaves no greasy residue - which is why it became an award-winner almost immediately after launch.

What it contains:

• 5% Niacinamide - oil control and tone-evening in your moisturiser step
• 0.2% Ceramide Complex - rebuilds and reinforces the skin barrier
• 5% Glycerin - a humectant that draws and retains moisture in the skin
• 3% Betaine - soothes and supports moisture balance
• Omega-rich oils - nourish without clogging, supporting a healthy, balanced skin surface

Key clinical results (**4-week independent consumer study of 22 people)

• 95% agreed skin tone looked more even after 28 days
• 100% said skin felt deeply hydrated after 14 days

Awards: Recognised by Get the Gloss, Allure, ELLE, Vogue, and Women's Health - making it one of THE INKEY LIST's most celebrated launches.

How to use:
Apply after your 10% Niacinamide Serum as the final step before SPF in the morning, or as your overnight moisturizer in the evening.

Shop Omega Water Cream

Not all niacinamide products are created equal. Here's what to look for when choosing - and why INEY's formulations tick every box.

Concentration

The concentration of niacinamide in a formula determines what it can and can't do for your skin. Here's a simple guide:

For the majority of people,10% is the optimal starting point— and for many, the best long-term concentration. More isn't always better; consistent use of 10% will outperform sporadic use of 20%.

Supporting Ingredients

The best niacinamide products don't lead with niacinamide alone. Look for ingredients that support and enhance its action:

Hyaluronic Acid - keeps skin hydrated as niacinamide regulates oil (included in our 10% Niacinamide Serum)

Ceramides - reinforce the barrier niacinamide is working to build (included in Omega Water Cream)

Glycerin - lightweight humectant that supports moisture balance without heaviness

Allantoin - soothes and calms the skin, supporting daily tolerability

Squalane - non-comedogenic barrier support; plant-derived from sugarcane in our formula

Format

Serum: The highest concentration delivery format - best for targeted treatment. Apply before moisturiser for maximum absorption of the active. The INKEY LIst's 10% Niacinamide Serum is the recommended daily-use format.

Moisturizer: A lower concentration paired with barrier-supporting ingredients - excellent as a secondary niacinamide source in your routine. Omega Water Cream's 5% Niacinamide works synergistically with the serum.

Toner: A lighter delivery format, useful for introducing niacinamide to very sensitive or reactive skin.

Formulation Quality

• Fragrance-free (reduces risk of irritation, especially for sensitive skin)
• Dermatologist-tested
• Non-comedogenic (won't clog pores - critical for a product targeting blemish-prone skin)
• Stable pH (niacinamide is most effective and stable at a pH of around 6; INKEY's serum is formulated at pH 6.09)

Is Niacinamide Safe?

Niacinamide is one of the most extensively researched and widely used actives in dermatology, with a safety profile that spans decades of clinical study. In topical skincare, it is considered very well-tolerated across virtually all skin types - including sensitive, rosacea-prone, and eczema-prone skin. Unlike many actives, it does not require a patch test period or a gradual introduction at low frequency; most people can begin using it daily from the outset.

It is also suitable for use during pregnancy and breastfeeding. Vitamin B3 is an essential nutrient during pregnancy, and niacinamide applied topically is widely considered safe. Always consult your midwife or healthcare provider if you have specific concerns.

Potential Side Effects (Rare)

Flushing or tingling: Extremely rare with niacinamide in topical skincare. This is associated with niacin (the oral supplement form of Vitamin B3), not niacinamide. If you experience any flushing, it is likely due to another ingredient in your routine, not niacinamide.

Initial purging: Niacinamide does not cause purging. It does not accelerate cell turnover, which is the mechanism behind purging with actives like Retinol or strong AHAs. If you notice breakouts after introducing niacinamide, check other products you may have introduced at the same time before attributing it to niacinamide.

Sensitivity to high concentrations: A small number of people with very reactive skin may experience mild sensitivity at 20% concentrations. Starting with 10% eliminates this concern for the vast majority.

Who Should Take Care

• Those using multiple high-strength actives simultaneously: If your routine already includes Retinol, strong AHAs, and Vitamin C, introduce niacinamide as you would any new product - one at a time, monitoring your skin's response
• Those with extreme sensitivity: Patch test on the inner arm before full-face application - not because niacinamide is likely to cause a reaction, but as good skincare practice for any new product

What to Avoid Combining (in the Same Application Step)

• High-strength exfoliating acids (AHAs, BHAs, PHAs) directly mixed with niacinamide in the same palm - use them as separate routine steps rather than cocktailing
• High-concentration unstabilised Vitamin C in the same application - use them at different points in your routine

Application Tips

Apply Niacinamide before Retinol - always. Niacinamide creates a calming, barrier-supporting base that buffers the potential irritation of Retinol. This simple sequencing makes one of skincare's most powerful combinations far more manageable, especially when you're building up Retinol tolerance.

You don't need to wait between steps. Unlike some active combinations that require a waiting period, niacinamide can be followed immediately by your moisturizer once it has been gently pressed into the skin. A brief 30–60 second natural absorption time is all you need before moving to the next step.

Use it under makeup. In your morning routine, niacinamide serum makes an excellent pre-makeup step - it creates a more balanced, less oily skin surface that helps foundation and other products sit more evenly and last longer.

Common Mistakes to Avoid

Stopping when you break out. A breakout is not a signal to stop using niacinamide - it's precisely the moment to continue. Its anti-inflammatory action is most valuable when your skin is most reactive. Keep going.

Starting at 20% when 10% will do. Higher concentrations are not inherently better. For the majority of people, 10% niacinamide used consistently every day will deliver better results than 20% used irregularly. Start with 10%, use it daily, and give it at least 8 weeks before evaluating whether a higher concentration is necessary.

Expecting immediate results. Niacinamide builds its effect over time. Oil control: 1–2 weeks. Blemish reduction: 4–6 weeks. Pore refinement: 6–8 weeks. Hyperpigmentation and tone-evening: 8–12 weeks. Trust the process.

Mixing it with other products in your palm. Apply each skincare step separately. Mixing serums before application can alter pH, affect stability, and reduce the efficacy of each ingredient.

Pro Routine Order for Oily and Acne-Prone Skin

1. Salicylic Acid Cleanser - unclogs pores and removes excess oil
2. Hyaluronic Acid Serum (on damp skin) - lightweight hydration
3. 10% Niacinamide Serum - oil control + blemish reduction
4. Omega Water Cream - barrier support + finish
5. SPF 30+ (morning only)

At The INKEY List, we formulated our 10% Niacinamide Serum at the concentration that decades of peer-reviewed research identifies as the most effective and most tolerable for daily use on a broad range of skin types. 10% is the level at which niacinamide's oil-regulating, anti-inflammatory, and barrier-supporting actions are clinically validated — and the level at which it remains accessible to sensitive skin without compromise.

The pH of our serum is 6.09. This matters. Niacinamide is most stable and most effective in a formulation with a slightly acidic to neutral pH, close to the skin's own natural pH range. Formulating at 6.09 ensures the active ingredient is delivered to skin in its most bioavailable form, maximising results from every use.

We also made deliberate choices in the supporting ingredients. Hyaluronic Acid ensures the formula hydrates rather than dehydrates as it regulates oil. Squalane - derived from sugarcane, not shark liver - provides a non-comedogenic, skin-identical barrier support. Allantoin soothes, ensuring tolerability for the most reactive skin types. Every ingredient earns its place.

Our Quality & Ethics Standards:

• Fragrance-free
• Pregnancy and breastfeeding safe
• Leaping Bunny Certified (cruelty-free)
• B Corp Certified
• Carbon Net-Zero
• 100% recyclable packaging

Morning Routine - Oily / Combination / Acne-Prone Skin

Evening Routine - With Retinol

Ingredient Combinations That Work

Niacinamide isn't a trend. It's one of the most comprehensively studied, consistently validated, and universally tolerated actives in modern skincare - and it's been quietly doing its job in dermatology for decades before the internet caught up with it.

If you deal with excess oil, acne and blemishes, visible pores, uneven skin tone, or a compromised skin barrier, niacinamide belongs in your routine. It won't ask you to go through a purging phase. It won't cause sensitivity or dryness. It won't fight with your other actives. It simply works - visibly, consistently, and at a price point that refuses to make good skin a privilege.

The best place to start is INKEY's 10% Niacinamide Serum - $10.50, 30ml, over 700 five-star reviews, and a formula that has made it one of our most repurchased products for good reason.

Use it consistently. Give it time. And watch your skin become a more balanced, clearer version of itself.

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Evening Routine - With Retinol

Ingredient Combinations That Work