Azelaic Acid VS Niacinamide: Which Is Right For YOU?

Last Updated on April 5, 2025 by Giorgia Guazzarotti

OK, so let me guess: You’ve been dealing with breakouts, or redness, or those annoying dark spots that just won’t fade – and suddenly every product you Google has either azelaic acid or niacinamide in it.

Sometimes both. Sometimes mixed with, like, snail slime and fermented mushrooms. This whole azelaic acid VS niacinamide debate is so confusing! And now you’re sitting there thinking:

• Wait… do I need both?
• Are they secretly the same thing?
• Which one is actually gonna fix my skin?
• Why does every influencer act like both are magic but never explain what the hell they do?

I got you.

This is all you need to know about what azelaic acid and niacinamide actually do, how they’re different, if you can use them together without your skin flipping out, and which one to include in your skincare routine:

Azelaic Acid: What It Is And How Does It Benefit Skin?

Azelaic acid sounds like something that would burn a hole through your countertop, but hear me out – it’s actually weirdly gentle. Azelaic acid is a dicarboxylic acid (don’t worry, that’s just a science-y way of saying it’s it’s way milder than Glycolic Acid or Salicylic Acid). It’s naturally found in grains like barley and wheat, and your own skin even produces it.

But the real skincare magic happens in lab-made, stabilized versions, usually in 10% or 15% concentrations. And while it doesn’t get as much hype as, say, retinol or vitamin C, dermatologists have been quietly obsessed with it for decades. Especially for acne. And rosacea. And hyperpigmentation. And post-inflammatory redness. Basically, if your skin is going through something? Azelaic acid is like, “I got you.”

Benefits Of Azelaic Acid 

1. It fights acne gently: Azelaic acid kills the bacteria that causes acne. But unlike harsher actives (looking at you, benzoyl peroxide), it doesn’t dry your skin out or send your barrier into a full-blown meltdown. Bonus: it also gently exfoliates, so it helps unclog pores too — but without the raw, flaky aftermath.  Studies say that 20% azelaic acid cream is just as effective as 5% benzoyl peroxide and 0.05% tretinoin — but way less irritating.
2. It helps with post-acne marks and hyperpigmentation: Azelaic acid blocks tyrosinase, the enzyme that helps produce melanin, which means it actively fades dark spots, melasma, and PIH (post-inflammatory hyperpigmentation). It’s like a little skin tone editor in a tube. Azelaic acid is clinically proven to reduce melasma and pigment irregularities, especially when combined with other topicals like glycolic acid or retinoids.
3. It calms redness and inflammation: Got rosacea or just super-sensitive skin that turns red when the wind blows? Azelaic acid is your new best friend. It has anti-inflammatory properties that reduce inflammation, calm visible blood vessels, and help minimize those small red bumps that nothing else seems to touch.
4. It gently exfoliates: Azelaic acid speeds up skin cell turnover, which helps with texture, bumps, dullness, and clogged pores. But unlike AHAs or BHAs, it’s not going to leave your skin red and raw. You get the smoothing benefits without the sting.
5. Safe for pregnant women: It’s one of the very few acne and skin-lightening ingredients that’s safe during pregnancy and breastfeeding.

Azelaic Acid Side Effects

Okay, so this part’s important.Even though azelaic acid is technically gentle, it can be annoying at first. Most common reactions (especially in the first few weeks):

• Tingling or mild stinging
• A little itchiness
• Dryness or flakiness
• Slight purging (if your skin is congested)

Best Azelaic Acid Picks

Here are the best azelaic acid products to treat any skin conditions you may have:

• Blemicalm Azelaic Acid 15% Clarifying Serum £26.00): Loaded with 15% Azelaic acid and colloidal oatmeal, it helps treat acne, soothe irritations, and lighten dark spots. Available at Facetheory
• Paula’s Choice 10% Azelaic Acid Booster ($36.00): It includes a touch of Salicylic Acid to unclog pores too. Available at Cult Beauty, Paula’s Choice, and SpaceNK
• The Ordinary Azelaic Acid Suspension 10% ($12.20): A simple, no-frills formula that just works without breaking the bank. Available at Beauty Bay, Cult Beauty, The Ordinary, and Ulta

Stop wasting your time and money on stuff that doesn’t work. Click on the image below to download “Skincare That Works” and finally get your best skin day – every day.

Niacinamide: What It Is And How Does It Benefit Skin?

Niacinamide is a form of vitamin B (a fancy name for Vitamin B3, to be exact). That’s it. Nothing scary. It’s not an acid, it’s not exfoliating, and it’s not going to suddenly melt your face off. It’s actually one of the gentlest, most versatile ingredients out there — which is why skincare brands keep putting it in everything. 

Benefits Of Niacinamide

Here’s what niacinamide does (backed by science and by every skincare nerd who’s ever gone on a Reddit deep dive):

1. 1. It calms down skin irritation: Got redness? Blotchiness? Angry, reactive skin that flares up the second you try something new? Niacinamide is like the friend who talks you off the ledge. It reduces inflammation and helps soothe the drama. This is especially helpful for acne, rosacea, and just general skin crankiness.
2. It strengthens your skin barrier: Think of your skin barrier as the security guard that keeps the good stuff (hydration) in and the bad stuff (pollution, bacteria, irritation) out. Niacinamide helps rebuild and reinforce that barrier by boosting ceramide production — and that means your skin gets stronger, healthier, and less likely to freak out when the weather changes or you try a new product.
3. It helps with hydration: No, it’s not a moisturizer. But when your barrier is stronger and happier, your skin holds onto moisture way better. Pair niacinamide with a good hyaluronic acid or moisturizer, and you’ve got a glowy, bouncy situation going on.
4. It reduces uneven skin tone and fades hyperpigmentation: If you’ve got leftover acne marks or general unevenness, niacinamide can help fade that slowly over time. It doesn’t bleach your skin (we do not do that here), but it reduces how much melanin gets transferred to the top layers – which means dark spots fade more gently and evenly. Clinical studies have shown that 5% niacinamide can visibly improve hyperpigmentation and skin tone after just 4 weeks.
5. It regulates oil without drying you out: If you’re oily but sensitive (aka the combo-skin nightmare), niacinamide is chef’s kiss. It helps reduce how much oil your skin produces, so you look less shiny without over-stripping your face like a harsh cleanser would.
6. It might reduce pore size: This one’s a little controversial. Niacinamide doesn’t technically “shrink” pores (nothing really can), but by improving skin texture, calming inflammation, and reducing oil, your pores look smaller and less noticeable. And honestly? That’s good enough for most of us. 
7. It works for all skin type: Whether you have dry skin, oily skin, normal skin, combination skin, or sensitive skin, Niacinamide’s got you covered. It moisturises and soothes without leaving your skin a greasy mess.

Fun fact: NOTHING reduced my pores better and faster than Paula’s Choice 10% Niacinamide Booster. I was shocked.

Related: My Full Review of Paula’s Choice 10% Niacinamide Booster

Niacinamide Side Effects

Here’s the good news: niacinamide is super well-tolerated. Like, out of all the active ingredients in skincare, it’s one of the easiest on sensitive skin. You can usually use it every day, with other actives, and morning or night, without stressing.

That said (and this is important) more isn’t always better. If you go too hard with the percentage (10%+), especially if your skin’s on the sensitive side, you might get:

• Mild irritation
• Redness
• Itchy little bumps (rare, but it happens)
• The infamous “niacin flush” – a warm, tingling feeling that’s harmless but freaky

If that happens, don’t panic. Just scale back. Try a lower percentage (2–5%), and don’t mix it with five other strong actives on the same night. Your skin isn’t a lab experiment.

Best Niacinamide Picks

Here are the best skin care products with niacinamide:

• Paula’s Choice Resist 10% Niacinamide Booster ($42.00): It shrinks your pores, hydrates your skin, and brightens the complexion. Plus, it’s full of antioxidants (including Vitamin C) to help you keep those pesky premature wrinkles at bay, too. Available at Cult Beauty, Dermstore, Paula’s Choice, Sephora, and SpaceNK
• The Inkey List Niacinamide ($6.99): On top of hydrating niacinamide, it also has hyaluronic acid to add moisture back into the skin and Squalane to strengthen its protective barrier. Plus, it brightens skin and helps prevent wrinkles. Available at Boots, Cult Beauty, The Inkey List
• The Ordinary Niacinamide 10% + Zinc 1% (£5.00): Suitable only for oily skin, it reduces excess oil, helps treat acne, and reduces redness and inflammation. Available at Beauty Bay, Boots, Cult Beauty, Sephora, SpaceNK, The Ordinary, and Ulta

Azelaic Acid VS Niacinamide: Which One Is Better For Acne?

Short answer? Azelaic acid might win this round. But niacinamide’s still pulling weight.

Here’s the deal: Azelaic acid doesn’t just calm acne. It goes straight for the bacteria that cause it and tells them to pack their bags. It also helps unclog pores and reduces keratin buildup (aka the stuff that leads to whiteheads, blackheads, and cystic surprise-attacks). One study found that 15% azelaic acid gel was just as effective for mild-to-moderate acne as 5% benzoyl peroxide and 0.05% tretinoin, but with way fewer side effects.

Niacinamide, on the other hand, is like acne’s chill mediator. It doesn’t kill bacteria, but it calms inflammation (so those big angry spots don’t look so… volcanic), and it helps regulate oil production. Think of it as the acne prevention plan, not the attack mode. One study showed that 4% niacinamide worked just as well as 1% clindamycin (a topical antibiotic) for inflammatory acne, with no antibiotic resistance or dryness.  PubMed study link

Use azelaic acid if:

• You’re breaking out with bumps and leftover marks
• You want something stronger but not irritating
• You’re not getting enough from “gentle” products anymore

Use niacinamide if:

• Your acne is hormonal, mild, or linked to oil production
• You’re already using stronger actives and need something supportive
• You want an everyday anti-inflammatory helper

Verdict: Use azelaic acid to clean up the chaos. Use niacinamide to keep it from coming back.

Azelaic Acid VS Niacinamide: Which One Is Better For Hyperpigmentation (Dark Spots)?

Dark spots (aka hyperpigmentation) can be annoying as hell. Especially when the breakout is gone but the spot stays like a bad memory.

Niacinamide helps prevent melanin from being transferred to the surface of the skin. It’s kind of like intercepting a text before it gets delivered. Your skin’s like, “Nope, not showing this pigment today.” It brightens, fades unevenness, and works slowly and gently over time.  In one study, 5% niacinamide significantly improved hyperpigmentation and skin tone after just 4 weeks.

Azelaic acid, though? It blocks the enzyme tyrosinase, the one your skin uses to make melanin in the first place. That’s deeper-level action. It’s especially good for stubborn pigmentation, post-inflammatory marks (like after acne), and even melasma. A 20% azelaic acid cream was shown to be as effective as 4% hydroquinone (a literal prescription brightener) in treating melasma, but with way fewer side effects.

Use azelaic acid if:

• Your dark spots are deep, stubborn, or hormonal (melasma)
• You want something that works without bleaching or irritation
• You’re already using sunscreen daily (which you should be anyway, tbh)

Use niacinamide if:

• You’re just starting out and want to gently even out tone
• Your pigmentation is mild and post-acne
• You’re sensitive to stronger ingredients and need a slow-and-steady option

Verdict: Azelaic acid is the heavy lifter for stubborn spots. Niacinamide’s your gentle, consistent backup singer.

Azelaic Acid VS Niacinamide: Which One Is Better For Rosacea (& Sensitive Skin)?

Let’s just say it: most skincare isn’t made with sensitive skin in mind.

Azelaic acid is one of the few active ingredients that actually has a prescription version specifically for rosacea. It doesn’t just calm redness. It helps shrink the inflamed blood vessels and clears those little under-the-skin red bumps that nothing else touches. Studies have shown that 15% azelaic acid gel significantly reduces inflammatory lesions and visible redness in rosacea patients, and it’s often more effective than metronidazole, a common prescription.

Niacinamide, though, is like a daily hug for your skin barrier. It reduces trans-epidermal water loss (a fancy way of saying it helps your skin stay hydrated) and boosts ceramide production. It doesn’t go as deep as azelaic acid in treating rosacea, but it’s a perfect match for skin that’s reactive, dry, or just tired of being irritated. Clinical trials have shown that 2%–5% niacinamide improves hydration, reduces irritation, and increases skin resilience over time. 

Use azelaic acid if:

• You have rosacea-prone skin
• You get flushing, burning, or random inflammation flare-ups
• Your skin hates everything, but still needs something to help

Use niacinamide if:

• You’re just generally sensitive and want to strengthen your barrier
• You get redness from weather, over-exfoliating, or stress
• You need a calming ingredient that won’t cause drama

Verdict: Azelaic acid is your “I’m having a rosacea flare-up” firefighter. Niacinamide is your daily moisturizer’s reliable best friend.

Azelaic Acid vs Niacinamide: Which One Is Better for Acne Scars?

Let’s clear this up: If by “acne scars” you mean dark marks left behind after breakouts (aka post-inflammatory hyperpigmentation)? Both azelaic acid and niacinamide can help. But if you’re talking about textured, indented scars, the kind that look like dents or raised bumps? Neither of these ingredients will do much. Topicals can fade pigment. They can’t rebuild collagen deep in the skin. For that, you’re looking at things like microneedling, lasers, or prescription retinoids.

Verdict: Neither azelaic acid nor niacinamide will fix indented acne scars.

Azelaic Acid vs Niacinamide: Which One Is Better for Oily Skin?

Let’s be real: oily skin is exhausting. You wash your face and two hours later it’s like your T-zone is auditioning to fry an egg. Your makeup doesn’t stay put, your pores look like craters, and if you skip your routine for even one night? Boom! Breakout city. So what’s better for managing all that? Azelaic acid or niacinamide?

Niacinamide is the real MVP here. It doesn’t just deal with oil. It actually helps reduce how much oil your skin produces in the first place. Studies have shown that using a 2% niacinamide formulation can significantly lower sebum excretion rates in people with oily skin.

Translation: you’ll look less shiny, have fewer clogged pores, and your skin won’t feel like a slip-and-slide by lunchtime. Bonus: niacinamide helps tighten up the look of pores (no, it doesn’t shrink them – nothing really does – but they look smaller when there’s less gunk and oil stretching them out).

Azelaic acid, on the other hand, doesn’t directly regulate oil, but it does help with what happens because of the oil.

If your oiliness comes with breakouts, clogged pores, or bumpy texture, azelaic acid gently exfoliates and helps keep those pores clear. It’s anti-inflammatory, antibacterial, and amazing for oily, acne-prone skin. Just don’t expect it to slow down oil production itself -that’s not its thing.

Use azelaic acid if:

• Your oiliness comes with whiteheads, blackheads, or breakouts
• You need something to clear pores and calm inflammation
• You’re oily and acne-prone

Use niacinamide if:

• You want to reduce oiliness at the root
• You’re looking for less shine, smaller-looking pores, and better barrier function
• You’re oily but also sensitive and want something ultra-gentle

Verdict: Niacinamide wins for actual oil control. Azelaic acid’s great for the side effects of oily skin (breakouts, congestion), but if you’re tired of feeling greasy by noon? Niacinamide’s your girl.

Azelaic Acid vs Niacinamide: Which One Is Better for Darker Skin Tones?

If you’ve got melanin-rich skin, you already know: your skin behaves differently – in the best and most complicated ways. You’re more prone to hyperpigmentation. Every breakout leaves a mark. And way too many products either don’t work or straight-up make things worse. So let’s break down what azelaic acid and niacinamide actually do for darker skin tones, and which one deserves a spot in your routine.

Azelaic acid is a huge win for deeper skin tones – especially if you deal with post-inflammatory hyperpigmentation (aka those dark spots that stick around forever after a breakout or rash). It works by blocking an enzyme called tyrosinase, which is involved in melanin production. It doesn’t bleach. It doesn’t disrupt your natural tone. It just stops the overproduction of pigment where your skin’s been inflamed. And it does it gently.

One study showed that 20% azelaic acid was just as effective as 4% hydroquinone in treating melasma (a notoriously stubborn type of pigmentation) without the harsh side effects hydroquinone is known for. Also: azelaic acid is less likely to cause rebound pigmentation or irritation (darker skin tones are more reactive to inflammation, and irritation can actually trigger more pigment).

Niacinamide also works on pigmentation, but from a slightly different angle. It doesn’t block melanin production. Instead, it prevents melanin that’s already been made from being transferred to the upper layers of the skin (where it becomes visible as a dark spot). It’s slower, subtler, and more of a prevention tool than a treatment for deeper existing pigmentation.

In one clinical study, 5% niacinamide significantly improved hyperpigmentation and tone after 4 weeks, particularly in subjects with Fitzpatrick skin types III–V. Also great? Niacinamide strengthens the skin barrier, reduces irritation, and works beautifully in routines where you’re layering stronger actives like acids or retinoids. It makes everything else play nicer.

Use azelaic acid if:

• You’re dealing with dark marks from acne, shaving, or inflammation
• You want something that fades pigment without bleaching or irritating
• You’re prone to PIH (post-inflammatory hyperpigmentation) and need something effective but gentle

Use niacinamide if:

• Your pigmentation is mild or newer
• You want to prevent new spots while improving skin tone over time
• You’re using other strong actives and want something to support your barrier

Verdict: Azelaic acid is the heavy-hitter for stubborn hyperpigmentation in darker skin tones – without the risk of over-lightening or irritation. Niacinamide is a great maintenance tool, especially if you’re working on brightening, oil control, or calming irritation in your routine. For a lot of melanin-rich skin types? The combo is gold. One fades, the other protects.

Can I Use Niacinamide And Azelaic Acid Together?

Yes. If your skin is dealing with more than one thing (acne and dark spots, oiliness and redness), the combination of azelaic acid and niacinamide can actually work better than using either one on its own.

They don’t cancel each other out. They don’t irritate each other. And they target different issues in a way that makes them super complementary:

• Azelaic acid clears clogged pores, fights acne, fades pigmentation, and calms inflammation
• Niacinamide strengthens your skin barrier, reduces oiliness, evens tone, and helps your skin stay calm and balanced

How To Use Niacinamide And Azelaic Acid Together

Okay, so now that we’ve established azelaic acid and niacinamide is a winning combination that gives you best results, here’s how to actually use them without overwhelming your skin or turning your routine into a science experiment.

LAYERING TIPS

• You can apply niacinamide first if you want to buffer potential irritation from azelaic acid, especially if you’re new to actives or your skin is sensitive.
• If your azelaic acid is in a thicker cream or suspension, apply that after your niacinamide serum. Lightest to heaviest is the general rule.
• Use them once a day to start. You can build up to twice daily if your skin is loving it.

DON’T MIX WITH

• Strong AHAs (like Glycolic Acid or lactic acid) or BHAs (beta-hydroxy acids) in the same routine (it’s too much)
• Retinoids on the same night unless your skin is used to it
• A million other actives. Let this duo do its thing

Related: Mix And Match: Which Skincare Ingredients You Shouldn’t Use Together

How Long Does It Take to See Results with Azelaic Acid and Niacinamide?

Niacinamide and Azelaic acid are both effective ingredients, but they’re not miracle workers.  Most people start seeing results in 4 to 8 weeks. Nothing instant, but totally worth the wait.

• In the first 1–2 weeks: your skin might feel smoother, but don’t expect major changes
• By weeks 3–4: you may notice less oil, calmer breakouts, and more even tone
• By weeks 6–8: dark spots start fading, redness goes down, and your skin just looks… better

The Bottom Line

Two of the best skincare ingredients out there, azelaic acid and niacinamide aren’t trying to do the exact same job — and that’s what makes them such a good team. Azelaic acid is your go-to for acne, pigmentation, rosacea, and gentle exfoliation. Niacinamide is your calming, oil-controlling, barrier-strengthening multitasker.

If your skin is dealing with multiple things at once (which, let’s be honest, most of us are), the combination of azelaic acid and niacinamide is an effective treatment that can cover way more ground than either one alone. They’re safe to use together, backed by science, and work best when you’re consistent and patient. You also know what the best skincare products with them are, so you’re all settled for better results.