No.5+ Glutathione Vitamin Concentrated Serum
SUMMARY OF REVIEWS
Numbuzin No.5+ Glutathione Vitamin Concentrated Serum has a slightly viscous, hydrating texture that layers well under moisturizer, and several creators say it fades red and brown acne marks and adds overall glow with daily use over weeks. Mad About Skin (skincare focus) calls it a "little miracle" for preventing hyperpigmentation from breakouts, while Val Foché saw no effect and decluttered it.
FULL REVIEWS
POSITIVE
- “One product that I found... that just works just works is this”6:58–7:03
- “When I see a breakout happening... I start on this straight away. Twice a day, work it into the area. I don't get any hyperpigmentation from that breakout. It heals in the shortest possible time and it just works”7:14–7:22
- “If you have hyperpigmentation that isn't linked to breakouts, this will still work”7:28–7:32
- “This is almost like a booster, a way to turbocharge your hyperpigmentation routine”7:42–7:48
- “This is just a little miracle”
- “If you're on a hyperpigmentation journey and you want like a flash 2-week treatment that's just going to take your results from here to here, get this. You won't look back. So, so good”7:07–7:11
- “If you're an acne sufferer like me, that's a little dream”8:44–8:49
- Source: 5 game changing serums everyone should try - Apr 20, 2026
- “So many of you consider this as a vitamin C serum no it's not this is technically your multivitamin serum”
- “Majorly contains 5% niacinamide, 4% tranexamic acid, and cowberry extract, to brighten up your skin”
- “Formulation is very stable, and it's not vitamin C concentrated product, you can easily store it at the room temperature”
- “This serum has very very pale yellow cushy kind of a texture and when you apply it on your skin it feels very hydrating on the skin”
- “It's not gonna feel sticky but it will feel very hydrating on the skin”
- “I feel every skin type can use it”
- “This numbuzin serum does work in fading your red acne marks and brown acne marks”
- “You should be able to see a huge difference if you use it daily for one to two months”
- Source: Reviewing 4 Popular Brightening Korean Serums for Dark Spots - Nov 21, 2025
- “This one I find is a community favorite”
- “The texture of this is slightly viscous but it absorbs well and layers beautifully under my moisturizer”5:11–5:20
- “It's known as a brightening cocktail because it's loaded with ingredients that target both PIE and PIH”5:20–5:33
- “I find that this serum can give you a glow up over two to three weeks of use, especially improving overall clarity and the tone of your skin”5:47–5:55
- “This one can cause minor purging if your skin is not used to multiple brighteners, especially if your skin can't handle niacinamide and vitamin C derivatives together”5:55–6:07
- “I think that this is great for people who have both red and brown marks and want an allrounder serum”6:11–6:19
- “The only downside that I find with this serum is that it's not ideal if your skin is extremely sensitive or currently breaking out badly”6:19–6:28
- Source: Best serums for fading acne spots - Nov 5, 2025
MIXED / NEGATIVE
- “I haven't noticed any specific effects”4:39–4:45
- “I didn't notice any brightening or improvement in post acne”4:58–5:04
- “It could be that in comparison to those, this one is just not as effective for me”5:14–5:17
- Source: Unsponsored review of viral K-beauty skincare - Nov 16, 2025
- “Honestly, I didn't see any effect on my skin, any difference after using it for some time”21:34–21:41
- “I forgot about this product and after some time, I just decluttered it because it didn't do anything for my skin”21:44–21:48
- “I can't even say anything about it because it was like nothing”21:50–21:53
- Source: Yesstyle skincare bestsellers review - Mar 29, 2026
WHAT CREATORS SAY
- Consensus
- 3.5 / 5 from 5 creator reviewsGrailPeople ratings based on creator reviews.
- Good for
- Acne (2) · Dullness (2) · All skin types (2) · Hyperpigmentation (2)
- Features
- Hydrating (2) · Easy to use (2)
- ⚠ may not suit sensitive skin (1)
- ⚠ didn't help with acne (1)
- ⚠ didn't help with dullness (1)
- ⚠ didn't help with dark spots (1)
Product details
Details
- Type
- facial serum
- Finish
- —
- Shade
- —
- Key ingredients
- Glutathione, Niacinamide, Vitamin C, Tranexamic acid, Alpha-Arbutin, Panthenol, Hyaluronic acid, Shea butter, Bifida ferment lysate, Ceramide NP
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