COSRX The Niacinamide 15 Face Serum - 20ml - Ulta Beauty: Dark Spot Reduction, Oil Control, Alcohol-Free, Acne-Prone
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4.6 out of 5 stars with 210 ratings
Highly rated
$5.99
$5 Target GiftCard with $30 beauty products purchase
4.6 out of 5 stars with 1021 ratings
$18.69
$5 Target GiftCard with $30 beauty products purchase
4.6 out of 5 stars with 2607 ratings
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Guests are saying
This serum has garnered positive feedback for its ability to brighten skin, improve texture, and minimize pores. Many guests have reported visible improvements in their skin tone and a reduction in acne and dark spots. The lightweight formula absorbs quickly, making it suitable for daily use. However, some guests noted a slight burning sensation with frequent application. Overall, it is a popular choice for enhancing skin health and appearance.
Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
4.5 out of 5 stars with 1906 reviews
80% would recommend
5 recommendations
5 out of 5 stars
26 March, 2026
originally posted on cosrx
The serum is light weight
[This review was collected as part of a promotion.] The serum is light weight and leaves my skin looking and feeling great. Over time I have noticed that my pores are smaller and I don’t see as many white heads. This is a regular in my routine.
5 out of 5 stars
23 March, 2026
originally posted on http://www.ulta.com

Best product for oily skin
This product was an absolute game changer for me. I've struggled with oily skin forever and this helps my makeup stay in place all day!
5 out of 5 stars
20 March, 2026
originally posted on http://www.ulta.com

Amazing Formula
I have been struggling with painful cystic acne for the past 5 years and finding the right products for my sensitive skin. I decided after a lot of research to revamp my entire beauty regim and WOW my skin is now clear and the scars are fading quickly. I use this serum 2x a day and I am quite pleased so far. I combine this with a good cleanser, retionoid serum, hydrochloric acid, lightweight moisturizer (and sunscreen during the day).
5 out of 5 stars
Thumbs up graphic, would recommend
9 March, 2026Verified purchase
Very high quality skincare
Pure essence of skincare compounds. I noticed a difference in my skin immediately after using. COSRX is proving to be much more than just a snail goo company!
5 out of 5 stars
3 March, 2026
originally posted on cosrx
I think it helps with
[This review was collected as part of a promotion.] I think it helps with pore congestion and dullness.
5 out of 5 stars
28 February, 2026
originally posted on http://www.ulta.com

100%
I am seeing great results and oil reduction. I have been using this after hyaluronic acid and before my moisturizer during the day under foundation and and very happy with the results
5 out of 5 stars
23 February, 2026
originally posted on cosrx
This product is amazing. It
[This review was collected as part of a promotion.] This product is amazing. It shrunk my pores that have been irritated from other products.
5 out of 5 stars
Thumbs up graphic, would recommend
15 February, 2026Verified purchase
great product
love it. I have been using this for a year now. I rarely have any pimples and works wonders
5 out of 5 stars
Thumbs down graphic, would not recommend
11 February, 2026Verified purchase
(no review title)
It has changed my face routine
5 out of 5 stars
28 January, 2026
originally posted on cosrx
I love this serum! It’s
[This review was collected as part of a promotion.] I love this serum! It’s really helped my skin glow and I notice a difference when I wear it :)
5 out of 5 stars
27 January, 2026
originally posted on cosrx
I love this product. I
[This review was collected as part of a promotion.] I love this product. I have struggled with large pores for so long, but this has helped shrink them so significantly. I also have pretty sensitive skin, but this doesn’t irritate my skin at all. My only complaint is that it doesn’t last as long as my other COSRX products, but it honestly feels worth it because it does so much for me.
5 out of 5 stars
27 January, 2026
originally posted on cosrx
I always restock this because
[This review was collected as part of a promotion.] I always restock this because it works so well at keeping my pores in check.
5 out of 5 stars
25 January, 2026
originally posted on cosrx
So far so good, I
[This review was collected as part of a promotion.] So far so good, I can’t wait to see results after a couple of weeks.
5 out of 5 stars
24 January, 2026
originally posted on cosrx
Great product
[This review was collected as part of a promotion.] Works wonders in evening out my complexion and tightening pores. Applicator is really easy to use. Tough to tell ho much of it is left but well worth the spend
5 out of 5 stars
22 January, 2026
originally posted on cosrx
LOVE!! My skin is less
[This review was collected as part of a promotion.] LOVE!! My skin is less congested already after just a few weeks of use. Plumper too. Can’t wait to see more results
5 out of 5 stars
23 December, 2025
originally posted on cosrx
I have been using and
[This review was collected as part of a promotion.] I have been using and buying Niacinamide 15 every transaction because my skin can’t leave without it
5 out of 5 stars
22 December, 2025
originally posted on cosrx
good
[This review was collected as part of a promotion.] good
5 out of 5 stars
19 December, 2025
originally posted on http://www.ulta.com

Completely Changed my Skin in 1 Month
I use this every evening before bed and before moisturizer. My skin is glowing and plump and bright. It looks so much better than a month ago. My pores are tighter and I also never get acne now.
5 out of 5 stars
11 December, 2025
originally posted on cosrx
My daughter has been using
[This review was collected as part of a promotion.] My daughter has been using this product for a week now and we can see a huge difference already! I am always happy to support a company with clean products also!
5 out of 5 stars
2 December, 2025
originally posted on cosrx
This serum is easy to
[This review was collected as part of a promotion.] This serum is easy to absorb, great one to get to the skincare routine.