The Niacinamide 15 Serum, 0.67 oz.

4.5 (1,760)
Sorry, this item is currently unavailable.
Shop Similar Items
Shop All Cosrx
Have a question or need advice? Call one of our beauty pros at 1-800-247-3520.

Product details

Web ID: 16056907
A highly concentrated serum that combines the maximum concentration of niacinamide with optimal ratios of synergistic ingredients for total acne control.

  • Product Features

    • WHAT IT IS:
    • A highly concentrated serum with 15% niacinamide
    • WHAT IT DOES:
    • Provides total acne care; non-comedogenic tested; doesn't clog pores
    • INGREDIENT HIGHLIGHTS:
    • Niacinamide provides total acne care by controlling sebum production, soothing acne inflammation and diminishing post-acne scars
    • N-Acetylglucosamine (NAG) works in synergy with niacinamide to effectively fade hyperpigmentation
    • Zinc PCA inhibits inflammation and promotes recovery of damaged skin
    • Allantoin promotes collagen synthesis to facilitate skin regeneration
    • SKIN TYPES:
    • Suitable for acne-prone skin
    • HOW TO USE:
    • After cleansing, during the serum phase, apply a few drops to the skin
    • Use fingertips to gently massage and absorb the serum, starting from the center of the face working toward the edges
    • This serum can be used in the morning and/or afternoon; if applied in the morning, be sure to use with SPF of 30 or higher
    • RESULTS:
    • 45.27% improvement of activated sebaceous glands*
    • 48.07% improvement of oil synthesis amount*
    • 42.72% improvement of number of blackheads*
    • 50% improvement of number of whiteheads*
    • 15.50% improvement of hidden melasma and blemishes*
    • 19.47% improvement of pigmentation (visible melasma and blemishes)*
    • 2.59% improvement of triple-complexion skin tone (brightness)*
    • 24.89% improvement of triple-complexion skin tone (redness)*
    • 11.73% improvement of triple-complexion skin tone (yellowness)*
    • *Based on clinical trials with 20 subjects; results in 4 weeks; Dermacosmetic Skin Science Laboratory Co., Ltd.

  • Shipping & Returns

    • This item qualifies for Free Shipping with minimum purchase! exclusions & details
    • Our Normal Gift Boxing is not available for this item.
    • California and Minnesota customers call 1-800-289-6229 for Free Shipping information.
    • For complete details, see our Shipping and Returns policies.
  • talk with a beauty expert
    Makeup, skincare, scents—ask us about it all.
    1-800-247-3520
    Need help with something else?

Ratings & Reviews

Here's what customers think
  • The Niacinamide 15 Serum is reported to be an effective product, particularly for oily, acne-prone, or uneven skin.
  • Many users found it helped control oil and shine, minimize pores, and improve skin texture and clarity.
  • The lightweight, fast-absorbing formula was also praised for layering well with other products.
  • While a few users did not see significant results, the majority of reviews were very positive, with many stating they would continue using the serum.
AI-generated summary from 1,755 customers reviews.
4.5/5

1,760 star ratings, 1,755 reviews

Write a Review
63.3% of reviews have 5 stars
1114
24.4% of reviews have 4 stars
429
8.4% of reviews have 3 stars
148
2.5% of reviews have 2 stars
44
1.4% of reviews have 1 star
25

On average, customers rate the Oil-absorbing/moisturizing of this item as Oil-absorbing.

On average, customers rate the Heavy/light of this item as Neutral.

On average, customers rate the Best for day/best for night of this item as Best for night.

191 customer images

1,755 reviews
Lily H.
13 days ago
Incentivized review

I love this serum! It’s

I love this serum! It’s really helped my skin glow and I notice a difference when I wear it :)

Customer review from cosrx

Samantha L.
13 days ago
Incentivized review

I love this product. I

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.

Customer review from cosrx

S L.
14 days ago
Incentivized review

I always restock this because

I always restock this because it works so well at keeping my pores in check.

Customer review from cosrx

Yana B.
15 days ago
Incentivized review

So far so good, I

So far so good, I can’t wait to see results after a couple of weeks.

Customer review from cosrx

Dillon P.
16 days ago
Incentivized review

Great product

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

Customer review from cosrx

Kristin H.
18 days ago
Incentivized review

LOVE!! My skin is less

LOVE!! My skin is less congested already after just a few weeks of use. Plumper too. Can’t wait to see more results

Customer review from cosrx

Febby L.
2 months ago
Incentivized review

I have been using and

I have been using and buying Niacinamide 15 every transaction because my skin can’t leave without it

Customer review from cosrx

Puja A.
2 months ago
Incentivized review

good

good

Customer review from cosrx