COSRX

The Niacinamide 15 Serum

90 Reviews

• 순수한거미원숭이877

  Jun 27, 2025 (UTC)
  Oily SkinAcne Skin
  Review under verification

  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.

  OK

  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.

  OK
  Pros

  An ampoule that's perfect for oily skin to control excess sebum! Despite its high niacinamide content, it absorbs wonderfully! When applied in the right amount, it sinks in quickly. It seems to smooth out dead skin cells, leaving your skin texture looking great the next day.

  Cons

  Due to its high niacinamide concentration, it might pill if applied right before makeup. However, if your skin is well-prepped and in top condition, it can actually create a nice, matte finish for your makeup.

  Tip

  Even if you have oily skin, it can still get dehydrated, so it's a good idea to apply a light layer of a hydrating serum as well.

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• ohdhodhuf

  Jun 21, 2025 (UTC)
  수부지Sensitive 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.

  OK

  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.

  OK
  Pros

  The product itself is lightweight and absorbs well, making it pleasant to use.

  Cons

  Unfortunately, it didn't suit me. Usually, I only had small blemishes on my cheeks, but after using this, I suddenly developed inflamed acne all over my face, including my forehead where I never had issues before.

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• 라오니니니

  May 28, 2025 (UTC)
  Dry 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.

  OK

  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.

  OK
  Pros

  As someone with dry skin, I find that this product applies smoothly and absorbs well. The moisturizing effect lasts for a long time after application.

  Cons

  While it's not absolutely amazing, I can't find any real drawbacks either. It's pretty decent overall.

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• 곰돌데쓰

  May 11, 2025 (UTC)
  Dry 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.

  OK

  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.

  OK
  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 skincare routine.

  Cons

  I don't have any particular complaints. While I haven't seen noticeable results yet, I plan to keep using it consistently.

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• landsua

  May 4, 2025 (UTC)
  Dry 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.

  OK

  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.

  OK
  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.

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• mt1223

  Apr 14, 2025 (UTC)
  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.

  OK

  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.

  OK
  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.

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• 풀밭점심

  Apr 4, 2025 (UTC)
  Oily 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.

  OK

  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.

  OK
  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.

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• 뷔우삐롱

  Mar 8, 2025 (UTC)
  Dry SkinSensitive 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.

  OK

  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.

  OK
  Pros

  I tried this product for its niacinamide whitening properties and I'm really satisfied with how it absorbs! I think I'll need to use it consistently to see results.

  Cons

  There's nothing particularly disappointing about it. I didn't experience any blemishes.

  Tip

  I kept mine in the refrigerator while using it!

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• 단겨어얼

  Mar 5, 2025 (UTC)
  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.

  OK

  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.

  OK
  Pros

  It absorbs well and has a nice texture. Even those with oily skin can use it in the evening.

  Cons

  There weren't any major drawbacks in terms of how it feels. It's also decent for addressing pigmentation issues.

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• 젊은사슴08

  Mar 3, 2025 (UTC)
  Dry 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.

  OK

  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.

  OK
  Pros

  It absorbs beautifully and seems to quickly diminish blemishes and marks.

  Cons

  I wouldn't recommend applying it in the morning, but so far I haven't found any other reasons not to recommend it.