COSRX The Niacinamide 15 Serum Reviews

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

4.59

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87 Reviews

곰돌데쓰
May 11, 2025
Dry Skin
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Pros
The texture is water-like and absorbs well into the skin! I have dry skin and I'm using this in the first step of my routine.
Cons
I don't have any particular complaints. While I haven't seen noticeable results yet, I plan to keep using it consistently.

landsua
May 4, 2025
Dry 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 fantastic! I thought it wouldn't absorb well because of its water-like texture, but it absorbs really well! I also noticed it had a positive effect on my skin texture.
Cons
I tried this because COSRX is famous, but I didn't see any dramatically noticeable effects.
Tip
It worked even better when used together with a vitamin serum.

mt1223
Apr 14, 2025
Combination SkinSensitive 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
I didn't feel any irritation at all! Although I haven't been using it for long enough to notice dramatic effects, I was already using the Numbuzin Glutathione line and Nature Vitamin C ampoule. With this higher concentration, I can definitely feel the results. The texture is smooth, and unless you have very oily skin, I think the hydration and richness would suit anyone. It's a bit on the richer side for an ampoule, but it actually gives my skin a nice glow and keeps it from feeling dry, which I love. (I haven't seen any effects on dark spots yet though.)
Cons
I didn't experience any blemishes, and there wasn't really anything I found disappointing about it.

풀밭점심
Apr 4, 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
High concentration of niacinamide, yet it's gentle on the skin and absorbs beautifully!
Cons
While it's non-irritating, I find myself using it up quickly when layering due to the small amount in the bottle.

뷔우삐롱
Mar 8, 2025
Dry 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
I used the niacinamide whitening functional product and was satisfied with the spreadability, etc. I think I need to use it consistently.
Cons
There were no particular disappointments. There were no troubles.
Tip
I put it in the refrigerator and used it!

단겨어얼
Mar 5, 2025
Oily SkinSensitive 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 product had good spreadability and decent absorption. It can also be used by oily skin types in the evenings.
Cons
The usage experience was not particularly disappointing, and the pigmentation effect was quite satisfactory.

젊은사슴08
Mar 3, 2025
Dry SkinSensitive 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 product has a smooth and creamy application, and any blemishes or traces seem to disappear quickly.
Cons
In the morning, it seems like it should not be applied, and I have not yet found any other reasons not to recommend it.

지리카
Feb 25, 2025
Normal SkinSensitive 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
This has excellent spreadability, great color and shape, and improves the skin.
Cons
Although it can be a bit irritating at times, it seems to become more manageable as one gets used to it.

에메꼬
Jan 22, 2025
Combination 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
I purchased the 15% version to try before moving up to the 20% from the 10% Polaris Choice. It has no irritation, good spreadability, and is not sticky. The volume is too small, so I'll use it up quickly - I wish a larger size was available. I'm satisfied with the price-to-value ratio.
Cons
There are no issues with complex skin troubles or unsatisfactory usage experience. It is quite adequate.

냥이안녕
Jan 18, 2025
Dry 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
I really like this whitening product because it's more moisturizing than I expected. The scent and application are also great, so I feel good when I use it. I'll keep using it consistently to see if it can improve my skin tone.
Cons
The product was satisfactory, but the small dropper made it inconvenient to apply multiple times.