Final Up to date on July 19, 2026 by Giorgia Guazzarotti
Azelaic acid vs vitamin C: which one truly works higher for fading darkish spots? Vitamin C is in every single place in skincare, with its guarantees of brighter, extra glowing pores and skin, whereas azelaic acid is the dermatologists’ go-to for cussed marks that refuse to budge, particularly for delicate pores and skin or pregnant women. So which one must you select? The reality is, there isn’t a one-size-fits-all reply. The higher alternative relies on what’s inflicting your pigmentation, how delicate your pores and skin is, and what outcomes you’re hoping to attain. On this information, we’ll break down the distinction between azelaic acid and vitamin C for hyperpigmentation, so you may determine which ingredient makes probably the most sense on your pores and skin.
Azelaic Acid VS Vitamin C At A Look
| AZELAIC ACID | VITAMIN C | |
|---|---|---|
| HOW IT WORKS | Tyrosinase inhibitor and calms irritation | Antioxidant that interrupts melanin manufacturing and neutralises free radical harm |
| SKIN CONCERNS | PIH after zits, melasma, rosacea-related redness | Solar-induced dullness, normal uneven tone, antioxidant safety |
| EVIDENCE | Robust: a long time of medical trials, some head-to-head towards hydroquinone | Reasonable: combined medical outcomes on seen fading |
| SPEED | 8–12 weeks sometimes | 8–12 weeks, generally longer for seen spot fading |
| SKIN TYPES | All pores and skin sorts, together with acne-prone pores and skin and delicate pores and skin | Most pores and skin sorts, however formulation issues loads |
| SENSITIVE SKIN | Typically very properly tolerated | Can sting, particularly L-ascorbic acid at increased concentrations |
| PREGNANCY | Thought-about pregnancy-safe (all the time affirm along with your physician) | Typically thought-about secure, however verify formulation along with your physician too |
| SIDE EFFECTS | Delicate tingling, occasional dryness | Stinging, redness, oxidation points if poorly formulated |
| CAN BE COMBINED? | Sure | Sure |
Why Hyperpigmentation Occurs
Melanin is the pigment that offers your pores and skin its color. It’s made by cells referred to as melanocytes, which use an enzyme referred to as tyrosinase to transform an amino acid (tyrosine) into melanin. Enjoyable truth: melanin can also be your pores and skin’s defence mechanism towards UV rays. That’s why solar publicity makes pigmentation worse: UV gentle tells your melanocytes to ramp up manufacturing, principally as a protecting response. The issue begins when this course of goes into overdrive in particular spots. That may occur due to:
- Solar harm: spending an excessive amount of time within the solar with out satisfactory safety. Hey, solar spots!)
- Irritation: pimples, cuts or bag bites trigger post-inflammatory hyperpigmentation (PIH)
- Hormonal triggers: frequent particularly throughout teenager years or being pregnant (melasma is usually referred to as “the masks of being pregnant”)
Several types of hyperpigmentation have totally different root causes, so that they don’t all reply the identical option to the identical pores and skin substances. Melasma, as an example, is notoriously cussed and liable to coming again, as a result of it’s pushed by hormones and warmth as a lot as UV. PIH from zits is often simpler as a result of as soon as the irritation is gone, the surplus pigment simply wants assist clearing. So what must you use?
Associated: How To Treat The Dark Spots Left Behind By Pimples
How Azelaic Acid Fades Hyperpigmentation
Azelaic acid (a dicarboxylic acid, for these of you into the science) is a naturally occurring acid: it’s present in grains (like wheat, rye and barley) and it’s additionally a byproduct of yeast naturally discovered in your pores and skin. It really works by inhibiting tyrosinase, the enzyme answerable for kicking off melanin manufacturing. However it doesn’t simply block the enzyme throughout the board. It selectively targets hyperactive and irregular melanocytes with out affecting regular pigment cells. Which means that it targets darkish spots with out lightening different areas that don’t want lightening.
Azelaic acid additionally has actual anti-inflammatory properties, which makes it a fantastic choice for mild-to-moderate zits with moderate-to-severe post-inflammatory hyperpigmentation Azelaic acid additionally calms irritation, which issues loads for acne-related darkish marks. Darker pores and skin produces extra melanin in response to irritation, so breakouts usually tend to depart a darkish mark behind as an alternative of fading on their very own. Azelaic acid treats the irritation inflicting the mark and fades the mark itself, with out lightening the pores and skin round it. A 16-week study on 15% azelaic acid gel confirmed this: it improved both the acne and the marks it left behind.
The proof for melasma particularly is robust too. A well-known double-blind study comparing 20% azelaic acid cream against 4% hydroquinone cream, each used alongside a broad-spectrum sunscreen, ran for twenty-four weeks with 329 ladies and located azelaic acid produced good or glorious ends in 65% of circumstances, with no important distinction between the 2 therapies in decreasing lesion dimension and pigment depth. Most significantly, no circumstances of allergic sensitisation or ochronosis (blue patches of pores and skin generally seen with long-term hydroquinone use in darkish pores and skin) have been reported with azelaic acid. Supply:
How Vitamin C Fades Hyperpigmentation
Vitamin C works utterly otherwise. Simply because it brightens pores and skin, it doesn’t imply I does the identical job as azelaic acid. It doesn’t. Vitamin C (or ascorbic acid) is considered one of skincare’s greatest antioxidants. Its principal job is absorbing free radicals, the nasty buggers brought on by by UV rays and air pollution that break down pores and skin and velocity up darkish spots, high-quality strains, and indicators of ageing. Oh, and it performs an element in collagen manufacturing to maintain your pores and skin younger-looking. However it does greater than that. Like azelaic acid, vitamin C additionally inhibits tyrosinase to scale back melanin manufacturing. It simply does it extra gently and slowly.
This twin motion (defending pores and skin from harm due to its antioxidant properties and slowing down new pigment) is why vitamin C exhibits up in routines for anti-ageing, calming pores and skin, fading pigmentation, brightening, and solar safety, melasma included. A review of 31 studies found vitamin C is good at stopping new pigmentation caused by sun exposure. So consider it extra as prevention than a repair for spots you have already got – although it helps with each.
Fading current spots is the place the proof will get shakier. A 2023 review looked at vitamin C for melasma and sun spots. Beneath lab measurements, pores and skin genuinely seemed lighter. However when actual sufferers rated their very own pores and skin, most research confirmed no actual distinction versus a placebo. Researchers suppose this may partly come all the way down to the actual fact vitamin C can sting a bit, which can throw off how folks decide their very own outcomes. In addition they stated research in all probability must run longer to catch seen change.
FYI, not all Vitamin C is created equal. The pure kind, L-Ascorbic Acid, is the powerhouse antioxidant greatest confirmed to work. However it will probably irritate pores and skin and goes again rapidly, so manufacturers are utilizing derivates telling you they work simply as properly. They don’t. If you wish to fade darkish spots, you want the pure kind for greatest outcomes. Interval.
Associated: Types Of Vitamin C Used In Skincare: Which One Is Best?
Azelaic Acid VS Vitamin C: Which Works Higher For Totally different Varieties of Hyperpigmentation?
- Melasma: Azelaic Acid. In one 24-week study, 65% of women using 20% azelaic acid saw good or excellent results, matching hydroquinone, the go-to prescription choice. It’s additionally gentler on reactive, melasma-prone pores and skin and appropriate throughout being pregnant. Vitamin C helps shield towards the solar and warmth that set off melasma, however hardly ever shifts it by itself.
- Publish-Inflammatory Hyperpigmentation (PIH): Azelaic acid, simply. It calms the irritation inflicting new marks whereas fading outdated ones, and has delicate antibacterial motion too. Vitamin C can help therapeutic pores and skin, but it surely’s not doing the heavy lifting right here.
- Solar Spots (Photo voltaic Lentigines): Vitamin C’s strongest space. Solar spots come from UV harm, so an ingredient that protects towards UV and slows melanin manufacturing is a pure match. Layered below sunscreen, it additionally helps stop loads of the harm within the first place.
- Normal Uneven Pores and skin Tone: Simply uninteresting and flat slightly than distinct darkish marks? Vitamin C wins right here. It brightens the entire complexion, not simply particular person spots, and offers you radiant pores and skin.
Which Ingredient Works Sooner?
Neither of those is an in a single day repair, and if anybody’s telling you it’s, they’re promoting you one thing. Realistically: Azelaic acid sometimes exhibits seen change across the 8 to 12 week mark, generally sooner for inflammation-related redness, with continued enchancment over a number of months of constant use. Vitamin C timelines are comparable, roughly 8 to 12 weeks for noticeable brightening, although precise darkish spot fading (slightly than normal glow) can take longer. FYI, you might want to give each of them a serving to hand. To see quick outcomes, you additionally must:
- Be constant: when you use them solely once in a while, outcomes will take for much longer (duh!)
- Focus: whereas decrease concentrations work extra slowly, increased focus could irritate pores and skin and trigger irritation. The precise dosage is essential.
- Sunscreen: it doesn’t matter what you employ and the way fixed you might be with it, when you’re skipping each day SPF, you’re simply inflating harm quicker than you’re treating it.
- How deep the pigmentation sits in your pores and skin: the deeper it’s (I’m you, Melasma), the longer it takes.
- Pores and skin sort: when you use one thing that’s too irritating on your pores and skin sort, you’ll trigger irritation and make darkish spots worse.
Which Is Higher For Delicate Pores and skin?
Azelaic acid. It’s one of many gentlest lively substances on the market, which is why dermatologists usually attain for it first with rosacea, delicate pores and skin, or throughout being pregnant. You may get delicate tingling while you apply it, but it surely settles quick and fades with use. With Vitamin C, issues are extra sophisticated. L-ascorbic acid is the simplest, but in addition the almost certainly to sting or irritate pores and skin, particularly in increased strengths. You may use extra steady types of vitamin C, however they merely don’t work as properly. So that you may as properly go instantly with azelaic acid. Mentioned that, all the time patch take a look at first. Simply in case.
Can You Use Azelaic Acid And Vitamin C Collectively?
Sure – you simply must do it the appropriate manner. I all the time suggest my purchasers to make use of a Vitamin C serum within the morning, simply earlier than sunscreen, to spice up its solar safety and stop loads of solar harm and darkish spots within the first place. Then, use an Azelaic Acid product each different night time earlier than moisturiser. In the event you use retinol, use that on nights you don’t use retinol. All the time alternate days to keep away from overwhelming your pores and skin and inflicting irritation. And when you exfoliate, cease. Azelaic acid has delicate exfoliating properties, so that you don’t want a separate exfoliant in your skincare routine too. Meaning no glycolic acid, no salicylic acid, no pure exfoliant, no scrub… Azelaic acid is sufficient.
Which Of These Powerhouse Substances Ought to You Select?
Use azelaic acid if: your pigmentation adopted zits or any form of pores and skin irritation, you’re coping with melasma, your pores and skin is delicate or rosacea-prone, otherwise you need a therapy that’s secure throughout being pregnant (although it’s best to all the time run this by your physician or midwife first, each being pregnant and scenario is totally different).
Use vitamin C if: you wish to brighten uninteresting pores and skin whereas regularly fading pigmentation, your darkish spots are primarily sun-related, otherwise you need the added antioxidant safety towards future environmental harm on prime of pigment correction.
Use each if: you’re coping with cussed, long-standing hyperpigmentation that hasn’t budged with one ingredient alone and your pores and skin tolerates a number of lively substances with out freaking out.
The Finest Azelaic Acid Skincare Merchandise:
- Facetheory Blemicalm Azelaic Acid 15% Clarifying Serum (£26.00): Loaded with 15% Azelaic acid and colloidal oatmeal, it helps deal with zits, soothe irritations, and lighten darkish spots. Obtainable at Facetheory
- Paula’s Alternative 10% Azelaic Acid Booster ($36.00): It features a contact of Salicylic Acid to unclog pores too. Obtainable at Cult Beauty, Paula’s Choice, and SpaceNK
- The Odd Azelaic Acid Suspension 10% ($12.20): A easy, no-frills method that simply works with out breaking the financial institution. Obtainable at Beauty Bay, Cult Beauty, The Ordinary, and Ulta
The Finest Vitamin C Serums:
- MaeLove Glow Booster ($27.95): The most cost effective Vitamin C serum on this record, it does the whole lot the others do, but it surely accommodates a citrus extract which may be irritating for delicate pores and skin. Obtainable at Maelove.
- Paula’s Alternative C15 Booster ($46.75): It’s enriched with Hyaluronic Acid and glycerin to deeply hydrate pores and skin. Obtainable at Cult Beauty, Dermstore, Paula’s Choice, Sephora, and SpaceNK.
- Skinceuticals CE Ferulic ($169.00): The unique Vitamin C serum, it prices an arm and a leg, but it surely works wonders and delivers what it guarantees. Obtainable at Dermstore and Skinceuticals.
The Backside Line
There isn’t a common winner right here. They’re each celebrity substances. Azelaic acid wins for melasma, acne-related PIH, and delicate pores and skin. Vitamin C tends to shine extra for sun-induced pigmentation, normal dullness, and as a each day antioxidant protect that helps stop new harm from turning into new darkish spots down the road. The only option relies on what sort of hyperpigmentation you’re coping with, how delicate your pores and skin is, and what you’re truly making an attempt to attain.
