Ultra Pure High-Potency Serum 9.8% Glycolic Acid 1 oz.

4.6 (350)
$30.60
$36.00
Sale ends 4/27/25
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Product Details

Web ID: 4633961

What It Is

A concentrated 9.8% Glycolic Acid serum made with only 7 ingredients that visibly smoothes skin texture and boosts skin's glow.
  • What It Does

    With 9.8% Glycolic Acid, this serum is formulated with just seven ingredients to help visibly refine and smooth skin's texture and boost skin's glow. Free of fragrance and colorants, this concentrated serum is minimally formulated for skin absorption and smoothing effect.
  • How To Use It

    In the evening, apply 2-3 drops to clean, dry skin.
  • Clinical Results

    - After 1 Week, 98% agree skin feels softer*
    - Instantly, 83% felt refined texture*
    - Smoother skin in 1 week**

    *Reported by consumers in a 4-week study.
    **Expert grading in a 4-week clinical study.
  • Product Features

    • 1 oz.
    • Made in USA
  • Shipping & Returns

    • California and Minnesota customers call 1-800-777-0000 for Free Shipping information.
    • Please call customer service for returns.
    For complete details, see our Shipping and Returns policies.

Ratings & Reviews

4.6/5

350 star ratings & reviews

Write a review
237
85
20
4
4
13 days ago

Dark Marks Under Eyes Resolved

Easy to apply, no smell, absorbs quickly and instant results. Highly recommend.

Customer review from kiehls.com

26 days ago
from San Francisco
Age25-34
GenderFemale

Clears me up

[This review was collected as part of a promotion.] This stuff really clears up my blemishes quickly and I use a jade roller to apply it, it’s a nice combination

Customer review from kiehls.com

1 month ago
Age25-34
GenderMale

HOW TO USE IT

[This review was collected as part of a promotion.] IS IT RECOMMENDED TO USE EVRYDAY? Ive been using this for a while, and i still dont know if i should ise it everyday or twice a week.

Recommends this product

Customer review from kiehls.com

4 months ago
from CA
Age45-54
GenderFemale

On auto renew

I used several glycolic formulas and this serum feels good, absorbs well, and has mad a significant difference in the appearance of my forehead lines.

Recommends this product

Customer review from kiehls.com

4 months ago
Incentivized review

product ok

Undeniably, skin looks brighter. 2 weeks after I am still waiting for even skin.

5 months ago

This serum, with 9.8% glycolic acid and only 7 ing

I love Kiehl's products, and a consultant recommended I try this one. The serum is formulated with only 7 ingredients, including 9.8% glycolic acid, ensuring a simple yet effective skincare solution. I immediately felt a gentle polishing effect during the first application. The serum absorbs quickly into the skin without any stickiness and has a neutral scent. After a few weeks, my skin feels noticeably firmer. Highly recommend! The packaging is minimalistic and user-friendly, featuring a precise dropper for easy application.

  • Photo from olhap27_2263

Customer review from influenster.com

5 months ago
from Greenville NC
Age35-44
GenderFemale

Reduce fine lines!

[This review was collected as part of a promotion.] My husband loved it! Fine lines in his face were not reduced! We will reorder again.

Recommends this product

Customer review from kiehls.com

5 months ago

HOW TO USE THIS? SHOULD I USE THIS EVERYDAY

[This review was collected as part of a promotion.] Should i use this everynight? I just buy this and i dont know if i can use this everyday, or just 2-3 times a week? Please help me

Recommends this product

Customer review from kiehls.com

Response from kiehls.com

Consumer Care Center5 months ago

Hello! Our Ultra Pure High-Potency 9.8% Glycolic Acid Serum is a great choice for boosting your skin's glow and minimizing pores. Since it's a potent formula, we recommend starting with 2-3 applications per week in the evening, using just 2-3 drops on clean, dry skin. As your skin adjusts, you can gradually increase how often you use it. If you'd like extra hydration, try layering it with our Hyaluronic Acid serum, or for oil reduction and soothing, our Niacinamide serum works wonders. For more helpful tips and information, check out our website or the product packaging. We're excited for you to experience the benefits!