COSRX The Niacinamide 15 Serum Reviews

Name: The Niacinamide 15 Serum
Brand: COSRX
Rating: 4.59 (744 reviews)

4.59

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79 Reviews

실용적인해파리54639
Apr 17, 2025
Combination SkinAcne Skin
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This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
I can see that excess sebum isn't building up as much, and I feel like my skin is actually improving
Cons
To be honest, I don't have any particular complaints

우아한MS
Mar 20, 2025
Combination Skin
Review under verification
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Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
It seems to have regulated sebum production, as my blemishes have noticeably cleared up. I plan to order another bottle once I finish my second one.
Cons
The liquid has a bit of stickiness, so your skin doesn't feel completely matte after application. However, it has effectively tackled my blemishes.

이나뷰뷰
Mar 17, 2025
Normal SkinSensitive Skin
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Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
This seems great for summer use. It's said to be effective in reducing sebum, blackheads, and whiteheads. So when my skin is producing excess oil, which happens occasionally, it's perfect to use then.
Cons
It seems to be more effective for sebum control rather than brightening. Since it contains 15% niacinamide, those with delicate and sensitive skin should definitely do a patch test first.

상담부장
Feb 21, 2025
Oily SkinAcne Skin
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Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
The absorption is excellent, sebum secretion is improved, and the complexion becomes brighter.
Cons
I think I'll keep using it as it's so great. There's no trouble either, so I'll use it forever.

opklnm76
Feb 15, 2025
Oily Skin
Review under verification
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Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
It's not too watery or oily, so it's easy to apply. It controls oil well, and with consistent use, my blemishes have faded significantly.
Cons
While applying it in large amounts may cause slight pilling, there are no other notable downsides.

minjoo@
Feb 8, 2025
Oily SkinSensitive SkinAcne Skin
Review under verification
The content is currently being reviewed by the Hwahae operations team, and the verification will be completed by the next business day (excluding weekends and holidays) from the date the review was written.
Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
This really improved my skin a lot..!!! It seems to be effective on pores and sebum
Cons
It's sticky, so it's difficult to use in the morning..!! I only used it at night

Qymbat
Jan 9, 2025
Combination SkinSensitive Skinproduct.Atopy Skin
Review under verification
The content is currently being reviewed by the Hwahae operations team, and the verification will be completed by the next business day (excluding weekends and holidays) from the date the review was written.
Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
The product is great for brightening and sebum control✨✨✨ I will buy it again.
Cons
I have no complaints. I regret not purchasing it sooner. The price is also excellent.
Tip
Just buy it, you won't regret it. For complex, sensitive skin. Love it🫶🏻

시티즌보이
Dec 24, 2024
Oily SkinAcne Skin
Review under verification
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Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
I really like that niacinamide allows me to whiten my skin and manage my sebum production all in one go.
Cons
There may be a slight irritation, but it is due to the nature of the ingredients, so it should be taken into consideration.

양감옹
Dec 1, 2024
Oily SkinSensitive SkinAcne Skin
Review under verification
The content is currently being reviewed by the Hwahae operations team, and the verification will be completed by the next business day (excluding weekends and holidays) from the date the review was written.
Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
The formulation may feel slightly oily at first, but as time goes by, one can notice that it is not overly oily. You can clearly see that sebum production is reduced. As the sebum decreases, it also seems to have an effect on improving pore size.
Cons
Applying it to sensitive areas may cause irritation. It is recommended to use it only on non-sensitive areas. Avoid using it on dry areas as well. The amount seems too little.
Tip
The skin is resilient, and when combined with other functional ingredients, the effects can be further enhanced. It pairs well with the First Serum from the same line.

달달시럽
Dec 1, 2024
Combination Skin
Review under verification
The content is currently being reviewed by the Hwahae operations team, and the verification will be completed by the next business day (excluding weekends and holidays) from the date the review was written.
Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
I saw a significant effect in reducing sebum when using it. My T-zone tends to have prominent sebum secretion, but the difference was significant when I used the CosRX Niacinamide product consistently compared to when I was negligent. I recommend it.
Cons
The main drawback of the dropper-type seems to be that towards the end, the product doesn't come out well with the dropper, so you have to turn it over and shake it out. Other than that, I don't have any other complaints. :)