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Numbuzin

No.3 Vitamin Concentrated Serum.

Numbuzin No.3 Vitamin Concentrated Serum
Serums

About this product

A lightweight vitamin C serum formulated to brighten and even skin tone, combining multiple forms of vitamin C with antioxidant extracts including lingonberry and alpha arbutin.

Full ingredients

Guru Score

87%

Yay

6 experts · Strong agreement
Guru Certified
Broad expert consensus
6Gurus
6Yay
0Mixed
0Nay

What they liked

  • Calming and hydrating despite vitamin C content
  • Absorbs quickly without heaviness or greasiness
  • Gentle enough for acne-prone and sensitive skin

What they flagged

  • Brightening results may be subtle or absent

What the gurus are saying

This serum absorbs quickly and feels light and breathable on skin without greasiness or stickiness, which sets it apart from many vitamin C serums that can feel harsh or drying. Gurus found it calms redness and helps fade dark spots and dullness, making it gentle enough for acne-prone and sensitive skin types. The formula pairs multiple vitamin C forms with soothing panthenol and antioxidant extracts, so those looking for brightening without irritation may find this a solid fit.
Synthesized from 6 expert reviews · most recent take August 2026

What the gurus are saying.

Every take we've logged from this product's reviews across YouTube. Click any row to watch the moment they said it.

All takes Yay takes Nay takes Mixed takes Hide sponsored
Yay
"This is the Vitamin Concentrated Serum. I am so much more impressed with this than I thought I would be. It has five percent niacinamide, which is such a good level, and four percent tranexamic acid, combined with a tried and true ingredient in niacinamide rather than relying on the tranexamic acid alone. It also has some vitamin C derivatives lower on the ingredients list. It's a little bit thicker in texture, it feels a little heavy when you first apply it but then it absorbs really nicely. I do feel like this helped my skin bounce back after I had some breakouts. I have loved using this product, this is my second favorite product in the video."
All 2 takes from AliceintheRabbitHole
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"This is the Vitamin Concentrated Serum. I am so much more impressed with this than I thought I would be. It has five percent niacinamide, which is such a good level, and four percent tranexamic acid, combined with a tried and true ingredient in niacinamide rather than relying on the tranexamic acid alone. It also has some vitamin C derivatives lower on the ingredients list. It's a little bit thicker in texture, it feels a little heavy when you first apply it but then it absorbs really nicely. I do feel like this helped my skin bounce back after I had some breakouts. I have loved using this product, this is my second favorite product in the video."
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"This is Numbuzin's Vitamin Concentrated Serum, Brightening Antioxidant. This one also had my allergens in it in the past, but I feel like this brand has reformulated a ton, so I can try this one. I am so excited I can try this."
Yay
"This has everything you would expect. You've got your vitamin C, your glutathione, you've got a plethora of hyperpigmentation fighting ingredients. Got hydratants to hydrate. It's almost like a skin care routine in a bottle, which I really like. Great for streamlining. And it's not super heavy. It doesn't weigh down the skin. I've recommended this so many times on the channel and every time I do I'm flooded with comments of people saying yes I bought it on your recommendation and it really does work. The Numbuzin No.3 Vitamin Concentrated Serum is genuinely something special and I think if you're looking for streamlining and you're looking to fade hyperpigmentation this is going to be a must have."
All 13 takes from Mad About Skin
Top 10: BEST KOREAN SKINCARE 2024
"This is the Numbuzin No.3 Vitamin Concentrated Serum. I love it so much I've covered it extensively on the channel, in fact I did a separate video. It has glutathione, three different vitamin C derivatives, calming and soothing ingredients, everything going on in here to fade hyperpigmentation, boost collagen production in the skin. It's a one and done if you want to just wash your face, use one serum and then put your sunscreen on. This is that serum that's going to give you a full skincare routine in a bottle. Amazing results means we don't have to compromise just because we're streamlining. I think I'm on bottle six now. It did go out of stock for a little time, it's back and I'm so glad it is."
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"I've been using the pads in the interim because it's basically the same formulation. There's a few tweaks, but it's essentially the same formulation. The pads are great, but I think they're a little bit wasteful. So I am going to switch back to the serum now that it's back in stock. You've got your tranexamic acid. You've got your vitamin C. You've got your brightening agents. You've got so much in here that's just going to be a real comprehensive one-stop shop for anti-aging. It's going to help lift and brighten the skin. It's going to help fade hyperpigmentation. It's going to help boost collagen production to minimize fine lines and wrinkles. One-stop shop for your anti-aging. The pads are great, but for me, a little bit wasteful. So yes, I think the serum is where it's at. If you've been wanting to try this serum out, it's been out of stock for forever. Run, don't walk. Get it now."
ULTIMATE KOREAN SKINCARE - Next Level K-Skincare
"I absolutely love them. The ingredients in here are phenomenal when it comes to fading hyperpigmentation, dark spots, and discoloration. You've got your vitamin C's, you've got your niacinamide, your glutathione, all the things you want for fading hyperpigmentation. For me I prefer the serum. That's the texture that I enjoy applying the most and fits with my skincare routine."
MUST HAVE KOREAN SKINCARE - K-Skincare Everyone Should Own
"This is just a great all round serum. So tranexamic acid, similar to this, so you wouldn't need both of these. Tranexamic acid, glut C which is fantastic for fading hyperpigmentation, it's got a stable form of vitamin C, so many different calming and soothing ingredients. This is an entire skincare routine in a bottle. I absolutely adore this. On the go, if you're in a rush and you just want a one-and-one product, this is such a great one. I will always have my heart. This is not massively expensive, I think it's 17. It does go in and out of stock a lot, so I'd say if you like this and it's in stock buy a couple. It just works. Such a nice product that I rave about all the time."
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"This is the Numbuzin No.3 Vitamin Concentrated Serum. I've tried this out, first time about three months ago, and I was wowed by the results. This has everything: three different types of vitamin C, you've got glutathione working beautifully with vitamin C to really eradicate excess pigment, you've got some tranexamic acid, you've got some alpha arbutin, you've got some antioxidants. You've got a lot going on in here and it's still a super light formulation. This is a beautifully lightweight serum that just glides onto the skin. I actually find it's probably one of the most hydrating serums I've ever tried. It leaves behind a really nice plumping and hydrating effect on the skin, which is another reason I absolutely adore it."
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"This isn't oldie but it's a goodie, this is the Numbuzin No.3 Vitamin Concentrated Serum. It's packed full of tranexamic acid, you've got some vitamin C derivatives in here great for the evening routine, you've got calming and soothing ingredients, you got glutathione to fade hyperpigmentation which I definitely need. It does it all. I love this. Working that in doesn't sting, it doesn't burn, it doesn't pill considering how much active potency you've actually got in there. It just worked so so well and that just sinks all in."
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"I have the Numbuzin No.3 Vitamin Concentrated Serum, and this is an amazing amazing option. I personally prefer the serum version, but it's out of stock so there are pads available as well. I just prefer the ease of the serum. It's like a skincare routine in one. I use the two in my skincare routine all the time, and I'm on my second bottle."
BESTSELLING KOREAN SKINCARE 2024 - Skincare Favourites and Fails
"You've got your tranexamic acid, you've got beautiful blended niacinamide vitamin C, peptides, everything is happening in here. You can literally cleanse the skin, use this, put a sunscreen on and you're done. The key ingredient in here is glutathione, which works beautifully alongside that vitamin C to fade hyperpigmentation, glow up the skin, and just even everything out. I love that product, I cannot rave about it enough."
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"This has everything you would expect. You've got your vitamin C, your glutathione, you've got a plethora of hyperpigmentation fighting ingredients. Got hydratants to hydrate. It's almost like a skin care routine in a bottle, which I really like. Great for streamlining. And it's not super heavy. It doesn't weigh down the skin. I've recommended this so many times on the channel and every time I do I'm flooded with comments of people saying yes I bought it on your recommendation and it really does work. The Numbuzin No.3 Vitamin Concentrated Serum is genuinely something special and I think if you're looking for streamlining and you're looking to fade hyperpigmentation this is going to be a must have."
GREATEST BUDGET SKINCARE EVER - Top 3 Drugstore Skincare In Every Category
"The Numbuzin No.3 Vitamin Concentrated Serum is a Korean skincare brand that works so well because it has so many benefits. It's going to be your vitamin C, it's going to be your hyperpigmentation serum, it's going to be your calming and soothing serum, and it's even got peptides in there. It's amazing, it's phenomenal, and I absolutely love it. It comes in at about £14 here in the UK, so it's super inexpensive when you think of it as a 4-in-one. I love this. It's been my go-to for two or three years. The reason I think this is so cost effective is not only is it affordable in the first place, doesn't break the bank to buy, but it actually is a skincare routine in a bottle. You could just cleanse, pop a toner on, use this serum, sunscreen, out the door. Four-step skincare routine, amazing benefits, not breaking the bank. This product allows you to be strategic because it just has so much going for it. I absolutely love it. I've raved about it to you guys relentlessly. It's a skincare routine in a bottle. It's so good."
KOREAN SKINCARE AWARDS 2025 - Very Best Korean Skincare
"This is my favorite skincare routine in a bottle. If you're somebody that doesn't want to have a million and one products in your routine, you want something to streamline, get this. It's packed full of everything you need in order to have a comprehensive routine from your vitamin C through to your calming and soothing ingredients. You've got your peptides. You've got your humectants to plump, nourish, and hydrate. And this has been really effective on my hyperpigmentation, my dark spots and discoloration as a result of adult acne. This just gets on top of it. It's a really nice product to slip into your routine and it's not super sensitizing. So if you're someone with super sensitive skin that wants an effective treatment for hyperpigmentation, this is it."
ULTIMATE KOREAN SKINCARE - Top 3 Korean Skincare Serums 2024
"This is the Numbuzin No.3 Vitamin Concentrated Serum and I genuinely adore this serum. It's packed full of everything you need for a comprehensive skincare routine and it just gets your glow game so on point. You'll be radiating to the gods even in the cooler winter months. The key here is glutathione, which I think is the star ingredient, along with two different forms of vitamin C stabilized so it's got a super long shelf life, which I love. You've also got a touch of niacinamide, but you've also got a range of different other vitamins in here to increase the luminosity of the skin, bring back that radiance, but also help you streamline things down. You can legitimately just use a nice cleanser, follow with this, put your sunscreen on and you will have a good robust skincare routine in just three steps. So if you're someone that's living a busy life and you just want to streamline everything down, this serum is definitely going to help you do that. I love the packaging. I love the freshness of it. This is always out of stock, but when it comes back you know that that product is fresh because it doesn't have time to sit around before people buy it."
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"I love the Numbuzin vitamin concentrate serum, I do not give it away lightly, it is one you are honored to receive."
Yay
"This is the Numbuzin No.3 Vitamin Concentrated Serum, and it's very similar to the toner and it is great for some serious brightening and really targeting hyperpigmentation on the skin. The ingredients here are pretty similar. We do have the niacinamide content as well as the glutathione and we have multiple forms of vitamin C. They've added an additional form of vitamin C in this one as well as arbutin. And they round out the serum with tranexamic acid as well as panthenol. And so that actually creates a really targeted, really potent brightening serum. Particularly good for stubborn hyperpigmentation because all of these brightening actives work at the hyperpigmentation at different pathways and different levels. If you have stubborn hyperpigmentation, melasma, or dark marks left after acne, sun damage, you do need multiple forms of actives. Just one at a really high percentage is likely not going to show you the types of results that you're seeking. You definitely want something a little bit more multi-layered, a little bit more sophisticated. And that's what I really admire about this serum. I think that it does it really well and really smartly."
All 2 takes from Kelly Driscoll
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"This has a really nice pleasing gel texture, kind of rides the line between a light gel and a medium gel. It's not full-on medium, I felt heftier gel serum textures, but there is a little bit of body to this. I've actually been really impressed with how this texture performs on the skin because the absorbency is really, really good. It doesn't feel like an extremely hydrating gel texture, it doesn't dive super deep into the skin, although it does contain panthenol. The main goal is to brighten your skin, and I'm very impressed with it. The way that it absorbs, it just absorbs so quickly into the skin and it feels very light once it is absorbed. It feels very breathable and there's no greasiness, there's no stickiness, there's no shine on top of your skin. Using this I've noticed results for hyperpigmentation. I have some dark spots that were left over from when I got pimples that got inflamed and swollen on my skin, and it absolutely worked for that. Dullness, absolutely worked for that. I think it actually helped a little bit with enlarged pores."
My numbuzin Top 5 Skincare Picks!
"This is the Numbuzin No.3 Vitamin Concentrated Serum, and it's very similar to the toner and it is great for some serious brightening and really targeting hyperpigmentation on the skin. The ingredients here are pretty similar. We do have the niacinamide content as well as the glutathione and we have multiple forms of vitamin C. They've added an additional form of vitamin C in this one as well as arbutin. And they round out the serum with tranexamic acid as well as panthenol. And so that actually creates a really targeted, really potent brightening serum. Particularly good for stubborn hyperpigmentation because all of these brightening actives work at the hyperpigmentation at different pathways and different levels. If you have stubborn hyperpigmentation, melasma, or dark marks left after acne, sun damage, you do need multiple forms of actives. Just one at a really high percentage is likely not going to show you the types of results that you're seeking. You definitely want something a little bit more multi-layered, a little bit more sophisticated. And that's what I really admire about this serum. I think that it does it really well and really smartly."
Yay
"This one is known for erasing hyperpigmentation, but we just tested the texture, and it surprisingly made it into the top two for two out of three testers. Jay picked it as her number one, it felt a bit slippery at first but she saw no signs of breakouts even with generous use, perfect for night care. Yuna, our most sensitive skin tester, ranked it second, she said it felt more like an emulsion and that she'd totally use it up. When it comes to erasing hyperpigmentation the usual serums are too tingly and a little aggressive, but this one still gives you pretty good hydration. Worth trying."
Top Pick: vitamin c serum
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"Honestly I haven't found a really well working vitamin C in the market so far, so the other four ingredients matter a lot more, but if I had to pick one vitamin C, I chose the number five serum. It has 5% niacinamide and panthenol, so it's gentler than most vitamin C serums, great for sensitive skin, and people say it does a pretty good job on post acne marks and dark spots."
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"This one is known for erasing hyperpigmentation, but we just tested the texture, and it surprisingly made it into the top two for two out of three testers. Jay picked it as her number one, it felt a bit slippery at first but she saw no signs of breakouts even with generous use, perfect for night care. Yuna, our most sensitive skin tester, ranked it second, she said it felt more like an emulsion and that she'd totally use it up. When it comes to erasing hyperpigmentation the usual serums are too tingly and a little aggressive, but this one still gives you pretty good hydration. Worth trying."
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"This serum is all about fading dark spots and brightening your skin. I don't have dark spots so I can't speak to that, and as for the brightening, I didn't see a thing. That said, it is moisturizing, at least for dry skin, if you have oily or combo skin keep it to your night routine only, it's a bit heavy for daytime. If you want to erase pigmentation, don't expect it to work like a cosmetic procedure, if you use like five bottles in a row maybe very dark spots become a little less dark, but it won't meet your expectations, it's not actually removing pigmentation, that's why I always say put the sunscreen on. It has vitamin C and glutathione and they made it low irritant, so where other vitamin C serums can be too much for sensitive skin, this one you can try. Not bad, just don't expect a miracle."
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"This one is very popular. It contains 5% niacinamide to help even out skin tone, 4% tranexamic acid effective against UV induced discoloration, and 5% panthenol to further soothe and hydrate the skin. Overall the blend of ingredients is designed to minimize potential irritation, and it's gentle enough to use before applying makeup. I'd rate this an A."
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"This serum line is for brightening, it has glutathione which is effective for brightening, and tranexamic acid, which is used as a treatment for melasma, is added. They tried to find the best combination with less irritation. I don't have that much pigmentation so I can't really see that much difference, it's not my favorite, but whenever I apply it, it definitely feels easy to use. Unlike other vitamin C products that can smell and feel itchy, this one is definitely soft. I tried it together with the number one toner for fading scars, it felt more moisturizing because of the ceramide and peptide, more bouncy, but I ended up not using this one that much because I'm not that focused on fading scars. I go with the number three serum instead, since that one makes my skin much more hydrated."
Chill&Chat: CYoung’s Live
"For fading acne scars I recommend Numbuzin number five, it can make them a little lighter."
Korean Skincare, Makeup Q&A LIVE 1
"The Numbuzin No.5 serum is popular, and if you use two or three bottles your skin becomes a little lighter, but usually it's not enough. I feel a little brighter using it, so you can try it out, but just don't expect too much, I think people expect too much from it."
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"This one is worth the hype, buy it. It's really good to apply in the morning and evening, pretty casually. Similar to the AXIS-Y serum, this one has 5% niacinamide, so if you have hyperpigmentation and dark spots this one actually fades them out, though for me I couldn't really see that much of a difference. Even though it's a vitamin C serum, it applies so well and it doesn't sting for me, I think because they also put in about 5% panthenol, which is amazing for dry skin because it improves your skin barrier. It's a well made vitamin C serum for all skin types."
Yay
"I actually really love this formula. They've got niacinamide as the third ingredient, probably about 5%. The fourth ingredient is panthenol, so it's your anti-inflammatory. The fifth ingredient is tranexamic acid, a lovely tyrosinase inhibitor for pigmentation. There's a fraction of a percent of vitamin C, and to be honest, this is not an airless pump, so vitamin C is unlikely to work. I actually really like this product for early pigmentation marks."
Yay
"If you've tried their vitamin 5 serum I really love that one, it's very nice. This one's in the same lineup. For ingredients we've got niacinamide, which is a great anti-acne skin brightening ingredient. We've got C buckthorn extract, which is a great antioxidant and also good for brightening skin. We've got arbutin which is a skin brightening antioxidant. We've got adenosine, which is cell communicating, anti-inflammatory. We've got glutathione, antioxidant free radical fighting and brightening ingredient. We've got masalic acid compound from centella that has anti-inflammatory, healing, antioxidant benefits. We've got Japanese gold thread extract, soothing antioxidant. We've got ceramide NP, skin identical ingredient. We've got sorbic acid, antioxidant, brightening ingredient, anti-aging ingredient. We've got panthenol, wound healing. We've got vitamin E, antioxidant. We've got argilene, which is the botox in a jar peptide."
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"If you've tried their vitamin 5 serum I really love that one, it's very nice. This one's in the same lineup. For ingredients we've got niacinamide, which is a great anti-acne skin brightening ingredient. We've got C buckthorn extract, which is a great antioxidant and also good for brightening skin. We've got arbutin which is a skin brightening antioxidant. We've got adenosine, which is cell communicating, anti-inflammatory. We've got glutathione, antioxidant free radical fighting and brightening ingredient. We've got masalic acid compound from centella that has anti-inflammatory, healing, antioxidant benefits. We've got Japanese gold thread extract, soothing antioxidant. We've got ceramide NP, skin identical ingredient. We've got sorbic acid, antioxidant, brightening ingredient, anti-aging ingredient. We've got panthenol, wound healing. We've got vitamin E, antioxidant. We've got argilene, which is the botox in a jar peptide."
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"It has a viscous gel water texture to it and a little bit of it goes a long way. It's not super liquidy like some vitamin C serums are, where you feel like it's dripping into your eyeballs. This texture is really nice, it's not too thick but a little bit still goes a long way. I'd say half a dropper ball is enough to cover your face and neck and it feels really nice. I recommend using antioxidant and vitamin C products in your morning routine because they help your sunscreen work better, they protect your skin from pollution and free radical damage. After cleansing and toning, apply three to four drops on face and neck, give it a minute to soak in, then apply your moisturizer or sunscreen. A little bit goes a long way and it sets to a natural finish. It does take like a minute to soak in. Once it soaks in, it sets to a natural finish and it's just a little bit slightly tacky but not noticeably so, to the point where it makes it uncomfortable. It works great under sunscreen and moisturizer too."
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"The Numbuzin number five vitamin serum is wonderful too."

What the evidence says.

Independent of what the gurus think, this is what the published research supports about the main active ingredients here.

Vitamin C

Topical vitamin C is an antioxidant with reasonable evidence for dullness and uneven tone. It breaks down in light and air, so how a product is formulated and packaged matters as much as the percentage on the front.

Source: DermNet

Niacinamide

Niacinamide has evidence behind it for redness, uneven tone and supporting the skin barrier, and it is usually well tolerated even by skin that reacts to most things.

Source: DermNet

Tranexamic acid

Tranexamic acid has a growing body of clinical evidence for melasma and the stubborn patches of pigment that other ingredients struggle with.

Source: DermNet

Frequently asked.

What is Numbuzin No.3 Vitamin Concentrated Serum?

A lightweight vitamin C serum formulated to brighten and even skin tone, combining multiple forms of vitamin C with antioxidant extracts including lingonberry and alpha arbutin.

Is Numbuzin No.3 Vitamin Concentrated Serum worth it?

Yes. All 6 gurus who reviewed it give it their stamp of approval, for a Guru Score of 87%.

What is Numbuzin No.3 Vitamin Concentrated Serum's Guru Score?

Numbuzin No.3 Vitamin Concentrated Serum holds a Guru Score of 87%. That is our read on how warmly the experts talk about it, based on the verdicts of 6 expert reviewers we have collected. It is also Guru Certified, our mark for products that hold broad approval across many expert reviewers.

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