Kiehl's Since 1851Ultra Pure High-Potency Serum 5.0% Niacinamide 1 oz.

Name: Ultra Pure High-Potency Serum 5.0% Niacinamide 1 oz.
Brand: Kiehl's Since 1851
Availability: OutOfStock
Rating: 4.60 (573 reviews)

What It Is

A concentrated 5% Niacinamide serum for oily skin made with only 10 ingredients that visibly reduces excess oil and shine.

What It Does
With 5% Niacinamide, this serum is formulated with just 10 ingredients to help visibly reduce excess oil and minimize the look of redness. Free of fragrance and colorants, this concentrated serum is minimally formulated for skin absorption and efficacy.
How To Use It
In the morning and evening, apply 2-3 drops to clean, dry skin.
Clinical Results
- After 1 week, 92% agree skin feels soothed*
- Instantly reduces excess oil by 58%**
- Reduced blemishes in 1 week***

*Reported by consumers in a 4-week study.
**Instrumental measurement in a 4-week clinical study.
***Expert grading in a 4-week clinical study.
Features
- 1 oz.
- Explore Bloomingdale's Skincare Guide to find your next bestselling favorite
- Made in USA
Shipping & Returns
- Our Normal Gift Boxing is not available for this item.
- California and Minnesota customers call 1-800-777-0000 for Free Shipping information.
For complete details, see our Shipping and Returns policies.

Ratings & Reviews

Here's what customers think

This serum is highly effective for a range of skin types and concerns.
Many users reported it helped control oil and shine, minimize pores, and improve skin texture and clarity.
The lightweight, non-irritating formula was praised for absorbing quickly without stickiness.
While a few found it slightly drying, most were highly satisfied with its ability to hydrate and nourish the skin while addressing issues like oiliness and uneven tone.

AI-generated summary from 573 customers reviews.

4.6/5

573 star ratings & reviews

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573 reviewssorted by Newest

brian_l49

3 months ago

Finally cleared my hormonal breakouts

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.