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Ultra Pure High-Potency Serum 5.0% Niacinamide video
(565)565

Ultra Pure High-Potency Serum 5.0% Niacinamide

Kiehl's Since 1851

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Details & care

What it is: An ultra-pure niacinamide serum that is formulated to reduce oil and shine.

Who it's for: Ideal for oily skin types.

How to use: Apply 4 to 5 drops to clean, dry skin in the morning and evening. Layer with other serums as needed. Can be used twice a day.

  • Paraben-free; phthalate-free; sulfate-free; silicone-free; oil-free; fragrance-free
  • Made in the USA
  • Item #7505938
  • Core Product ID 3333379RCR

Ingredients

Aqua/Water, Niacinamide, Glycerin, Propanediol, Methyl Gluceth-20, Hydroxyacetophenone, Sodium Hyaluronate, Caprylyl Glycol, Carbomer, Sodium Hydroxide.
Ingredients are subject to change at the manufacturer's discretion. For the most complete and up-to-date list of ingredients, refer to the product packaging

Shipping & returns

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Kiehl's Since 1851

Founded in 1851 as an old-world apothecary in New York's East Village, Kiehl's utilizes the finest ingredients in unique formulations to assure high-quality skin, hair and body care products. The company's unique, extensive background represents a blend of cosmetic, pharmaceutical, herbal and medicinal knowledge developed and passed on through the generations.

Reviews

(565)5654.6 out of 5
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Most helpful positive review

June 13, 2026

Finally cleared my hormonal breakouts

[This review was collected as part of a promotion.] The texture is super lightweight and disappears instantly with zero sticky residue. No fragrance, which I love. After three weeks, my redness is gone and my pores look noticeably refined.
brian_l49

Most helpful critical review

Sept 25, 2024

Burned my skin

First Kiehls product to disappoint me. Burned my skin causing small rash on my left cheek and nose area. Tried to return to Nordstrom, but because I tossed the box they would not accept it. So I just ended up dumping the product at the store trash. Lesson learned. Don’t toss the box even if it’s from a brand you trust.
CrsTna
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5 stars70%
4 stars23%
3 stars5%
2 stars1%
1 star1%
June 13, 2026

Finally cleared my hormonal breakouts

[This review was collected as part of a promotion.] The texture is super lightweight and disappears instantly with zero sticky residue. No fragrance, which I love. After three weeks, my redness is gone and my pores look noticeably refined.
brian_l49
June 13, 2026

Finally cleared up my oily T-zone

[This review was collected as part of a promotion.] The texture is super watery and absorbs instantly without feeling tacky. It has zero scent, which I love. After three weeks, my pores look smaller and my redness is way down.
lisa_w9
June 13, 2026

Finally cleared my hormonal breakouts

[This review was collected as part of a promotion.] The texture is very watery and absorbs instantly without any sticky residue. It has no scent, which I appreciate. My skin looks much clearer and less oily now.
lisa_h42
June 13, 2026

Finally calmed my oily T-zone and redness!

[This review was collected as part of a promotion.] My oily T-zone is finally calm. This watery serum sinks in fast with zero sticky residue, and the redness around my nose is gone. Best part? It's completely scent-free.
jason_b
June 12, 2026

Finally, a niacinamide that isn't sticky!

[This review was collected as part of a promotion.] I love how watery this is—not sticky at all. It has zero scent and has seriously calmed down the redness around my nose. My oily T-zone is finally behaving.
rachel_j11
June 5, 2026

Finally cleared my stubborn redness

[This review was collected as part of a promotion.] The texture is watery and absorbs instantly with zero scent. After three weeks, my skin tone looks so much more even and the redness around my nose has finally calmed down. Simple and effective.
mark_r57