A milky, lightweight facial serum from Allies of Skin that combines azelaic acid and kojic acid, designed to brighten the skin and fade dark spots and post-acne marks.
Milky and smooth with no grittiness, this serum is often praised for fading dark spots quickly and calming redness and acne-prone skin. It pairs well with tretinoin, though some find twice-daily use intense, so for some people, once a day may suit better. The one thing to keep in mind: not every take was glowing, as visible results didn't show for everyone and the price, about 100 dollars, keeps some from using it as often as they'd like.
Synthesized from 5 expert reviews · most recent take September 2026
"This is a wonderful product because it contains [kojic] acid, which is one of the best brightening ingredients. If you're looking to minimize hyperpigmentation, it really targets stubborn hyperpigmentation. [Kojic] acid is one of the best out there, and it uses a 1% concentration in this alongside the azelaic acid in a 10% concentration and some other great brightening agents."
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"If you're looking to fade your dark spots and discoloration in the shortest possible time, this is the best one for you. Yes, it isn't the cheapest product out there, but the technology that they use in this just really means you're getting the shortest possible results time. [...] If you want those speedy speedy results with hyperpigmentation, this is one of the very best products to go for."
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"This probably works the very best for me because [...] my hyperpigmentation is triggered by my adult acne. It contains kojic acid, which [...] really helps drive forward hyperpigmentation results, but it also contains azelaic acid which calms, soothes, and has acne fighting benefits too. This also has a potent blend of other brightening ingredients which they list all the percentages and ingredients on the front."
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"Azelaic acid is fantastic to use alongside any retinoid because it calms, it soothes, and it minimizes inflammation. These are all side effects of retinoids and tretinoin in particular. So if you can use something like azelaic acid that actually counters all of those side effects, it's going to be a win-win all the way. My favorite azelaic acid at the moment is this. This is the Azelaic & Kojic Advanced Clarifying Serum by Allies of Skin."
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"This is the Allies of Skin [Azelaic] Advanced Clarifying Serum. This is great because it has some other anti acne benefits and I'm quite acne prone so this works well."
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"I love this because it's got some acne fighting benefits, too. So if you're very acne prone like I am, particularly when I've got a cold, this works wonders. [...] It's quite a nice milky emulsion. [...] If you've got advanced hyperpigmentation, acne scarring, or anything like that, this works so so so well. You get a light tingling from it because after all it's an azelaic acid. You will get a light tingling, but nothing too extreme. And it's absolutely fine to use alongside retinoids."
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"I am super acne prone even though I'm 40. And azelaic acid is the thing that really helps me do that. Even if you're not acne prone, azelaic acid will help fade hyperpigmentation. It's a great great option to have. Now, I'm using this one because I think hands down, it's the best for minimizing breakouts, preventing acne, and just keeping that whole adult acne situation in check."
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"And this worked wonders on my breakouts. I've been using this consistently and I can genuinely say I have seen probably like a 50 to 60% reduction in my breakouts. The hyperpigmentation I used to get on the back of them fade so much quicker. It's been a miracle worker for me. It's not the cheapest product out there, but I don't mind paying for results and I've got results every single time with this. And actually for Allies of Skin, this is actually one of their more affordable products."
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"I absolutely love it. This really just helps me to get on top of my adult acne. I'm someone that's very acne prone, even though I'm now 40. And I use products like this to really just dampen that down. It's got all the essentials. You've got your kojic acid, but you've also in here got some other great ingredients to help minimize breakouts, blackheads, and just help take away some of that congestion that I definitely definitely experience. It's really helped my adult acne."
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"This is their azelaic and kojic advanced clarifying serum. Again, great if you have adult acne or breakouts. This will really help to minimize them."
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"If you're somebody that wants super gentle but you also want extra hyperpigmentation and dark spot fighting from your serum, this is the one to go for. It's not the cheapest, but this is almost like a skincare routine in a bottle. When you see it as almost like a three or four in one, it's definitely worth the splurge. [...] This is like azelaic acid derivative taken up like 20 notches to give you the very best outcomes whilst also keeping it super gentle."
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"This is hands down the best azelaic acid pairing to use alongside retinoids because the formula is going to help to minimize the risk of purging, breakouts, and sensitivity. A lot of people in the early stages of their retinoid experience something called purging where you get a lot of under the skin breakouts that then can turn into white heads, and that can put a lot of people off. [...] Using something like this can really minimize that, reduce the heal time of any breakouts that you do get."
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"This is the best breakout minimizing and hyperpigmentation correcting serum I have ever used. You've got kojic acid in here, which I love. You've got azelaic acid. Both of these ingredients reduce acne causing bacteria, but they also help eradicate excess pigment production. You've got a blend of beautiful calming and soothing ingredients, and some others are designed to mattify and reduce the oil levels in the skin. All of this is like an adult acne sufferer's dream product. I love it."
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"Within just a couple of weeks you'll start to see a more even skin tone minimizing the hyperpigmentation, it'll help control your acne and breakouts, and this for me is ding ding ding 10 out of 10 all the way."
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"I'm someone who's 40 and also acne prone, and [...] I think this is the first product I've ever used that I can genuinely say is specifically formulated for adult acne. You've got your azelaic acid, which minimizes acne causing bacteria, so it's just going to help everything in check. You've also got kojic acid, which is going to help lift any hyperpigmentation, dark spots, acne scarring. I feel as we age, it takes a lot longer for our blemishes to fade than maybe when we're in our teens."
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"If you want a more advanced formula, this is the Allies of Skin Azelaic and Kojic Advanced Clarifying Serum. This really does pack a punch for fading hyperpigmentation. Much more advanced, but it comes with a higher price point. It really will depend on your budget. [...] Use it alongside your retinoid. Trust me, your skin will love you for it. Your results will go through the roof and it will definitely help fade that hyperpigmentation alongside delivering all those retinoid benefits."
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"This has probably been the most effective product I have ever used for suppressing adult acne breakouts. I get far fewer breakouts now. It's been super warm here and this is normally where I break out all over my forehead but I've had maybe three or four zits this year thanks to this. Previous years I would be on my hundredth zit by now. Genuinely, if you have adult acne, this is worth every last penny."
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"This works quicker than any other hyperpigmentation serum I have ever put on my skin. Within two weeks your hyperpigmentation is fading, those dark spots are lifting, and you just have a more even skin tone. It also has some acne fighting benefits in there too, so if your hyperpigmentation is acne derived, like mine, this is an absolute must have, but even if you don't have breakouts and acne this will still help with sun-induced or hormonal hyperpigmentation."
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"It's an absolute holy grail. It has azelaic acid, which is great if you have acne prone skin, and kojic acid, [...] one of the best over the counter hyperpigmentation ingredients, plus plant based brightening agents like licorice root, [...] one of the best brightening ingredients you can use. They also list all the ingredients and percentages so you know what you are putting on your skin."
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"This has everything you need to fade acne marks, scarring and hyperpigmentation. You've got the kojic acid, you've got the azelaic acid, and a blend of other brightening ingredients. This one is great, particularly if you have acne prone or blemish prone skin that's leading to a lot of hyperpigmentation. This is an absolute must."
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"This is a wonderful product because it contains [kojic] acid, which is one of the best brightening ingredients. If you're looking to minimize hyperpigmentation, it really targets stubborn hyperpigmentation. [Kojic] acid is one of the best out there, and it uses a 1% concentration in this alongside the azelaic acid in a 10% concentration and some other great brightening agents."
"Azelaic Acid is meant to help with redness and pigmentation and overall clarity, and on paper, it makes sense to me. Now, I finished it. I didn't dislike it. I thought it was lovely, but I just can't say that I saw a shift either. And at this stage, if I'm going to keep something in rotation, I want to know what it's doing. So, for now, I'm not repurchasing."
"I have a small obsession with the Allies of Skin Azelaic & Kojic Advanced Clarifying Serum. That is not necessarily marketed as a hyperpigmentation serum, but it has azelaic acid in it, as well as some other pigment brighteners. [...] That is another fantastic multifaceted product."
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"It also feels really nice on the skin, it's like a milky serum. You could use it once a day or twice a day. I usually say twice a day if you're dealing with lots of hyperpigmentation and your skin isn't particularly sensitive. For some people, AIC acid twice a day is going to be a little intense, and I would layer it in your routine where you normally put your serums. Yeah, huge fan of this."
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"I have a small obsession with the Allies of Skin Azelaic & Kojic Advanced Clarifying Serum. That is not necessarily marketed as a hyperpigmentation serum, but it has azelaic acid in it, as well as some other pigment brighteners. [...] That is another fantastic multifaceted product."
"There's no grittiness to it. When you apply it to the skin, what you'll notice is if you look at it, there's almost like a milkiness and it almost looks like it's going to be gritty, but then when you apply it, it really is just so smooth. Now, this is 10% azelaic acid, but it packs a much heavier punch. I also love this packaging. I think it's absolutely beautiful and premium. [...] 1% kojic acid, 10% azelaic acid, 3% hexylresorcinol. So just an overall good formula for dark spots."
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"There's no grittiness to it. When you apply it to the skin, what you'll notice is if you look at it, there's almost like a milkiness and it almost looks like it's going to be gritty, but then when you apply it, it really is just so smooth. Now, this is 10% azelaic acid, but it packs a much heavier punch. I also love this packaging. I think it's absolutely beautiful and premium. [...] 1% kojic acid, 10% azelaic acid, 3% hexylresorcinol. So just an overall good formula for dark spots."
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"I have another azelaic acid product on my list, but I just don't really use this one because it's 100 dollars. I would really like to use it more, since azelaic acid is one of the ingredients I use the most in my skin care routine, [...] so this is one I've got to try from them."
"This has really been keeping my skin nice and clear this summer, even though I'm very [...] acne prone, especially in the summer. Azelaic acid is a fabulous ingredient for those with rosacea or acne-prone skin, and kojic acid helps to brighten [...] post-acne marks, [...] so it's a great pairing for anyone with acne-prone skin, congestion, or redness. This is amazing."
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"So it fades those post acne marks so quickly when I pair it up with tretinoin and I really love this. So great for those that have discoloration, dark spots, also great for those that have redness, you're acne prone. I would say this would be a great serum to incorporate and this can also be used everyday twice a day, but I don't usually use this in my morning. I usually keep this for night time."
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"This has 10% azelaic acid and 1% kojic acid. I find this to be very gentle and it's also very hydrating on the skin and I've never experienced irritation with this whatsoever."
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"It never disappoints. It really does brighten the skin in a shorter amount of time. And I really love how hydrating this is as well. In my opinion and for my experience with it, it is so gentle. I've never experienced irritation with this and it can be used every day, twice a day as well if you want. But if you just wanted to use this once a day, that is completely fine as well. [...] This one is great if you have post acne marks, dullness, as well as redness."
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"It has 10% azelaic acid, which is great for acne-prone skin and also for rosacea and facial redness, and it helps with texture, blackheads, and oily skin. [...] It also has 1% kojic acid, which helps brighten the skin, fade post-acne marks and dark spots, and liven up a dull complexion. [...] It has squalane and [...] bakuchiol in it too. I find it so effective, [...] it's very lightweight, and I find it quite hydrating. It's fragrance-free and great for all skin types. This is a fabulous one."
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"This has really been keeping my skin nice and clear this summer, even though I'm very [...] acne prone, especially in the summer. Azelaic acid is a fabulous ingredient for those with rosacea or acne-prone skin, and kojic acid helps to brighten [...] post-acne marks, [...] so it's a great pairing for anyone with acne-prone skin, congestion, or redness. This is amazing."
What the evidence says.
Independent of what the gurus think, this is what
the published research supports about the main active ingredients here.
Frequently asked.
What is Allies of Skin Azelaic & Kojic Advanced Clarifying Serum?
A milky, lightweight facial serum from Allies of Skin that combines azelaic acid and kojic acid, designed to brighten the skin and fade dark spots and post-acne marks.
Is Allies of Skin Azelaic & Kojic Advanced Clarifying Serum worth it?
Mostly yes. 4 of the 5 gurus who reviewed it give it their stamp of approval, for a Guru Score of 75%.
What is Allies of Skin Azelaic & Kojic Advanced Clarifying Serum's Guru Score?
Allies of Skin Azelaic & Kojic Advanced Clarifying Serum holds a Guru Score of 75%. That is our read on how warmly the experts talk about it, based on the verdicts of 5 expert reviewers we have collected. At least one expert has named it a Top Pick in its category.
Who is Allies of Skin Azelaic & Kojic Advanced Clarifying Serum best for?
Allies of Skin Azelaic & Kojic Advanced Clarifying Serum is generally suited to acne-prone skin.
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