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

4.6 (356)
$40.00
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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.

  • Features

    • 1 oz.
    • Made in USA

  • Shipping & Returns

    • This item may only be shipped using Standard.
    • 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

Here's what customers think
  • This exfoliating serum is highly effective at improving skin texture, smoothness, and brightness for most users.
  • It is described as lightweight and well-absorbed, with some initial stinging or dryness reported by a few customers, but generally well-tolerated even for those with sensitive skin.
  • Consistent use over 2-3 weeks led to noticeable complexion improvements for many users.
AI-generated summary from 356 customers reviews.
4.6/5

356 star ratings & reviews

Write a review
68.5% of reviews have 5 stars
244
23.9% of reviews have 4 stars
85
5.6% of reviews have 3 stars
20
1.1% of reviews have 2 stars
4
0.8% of reviews have 1 star
3

38 customer images

356 reviews
summerw
16 days ago

Instant glow with skincare benefits

This gives an instant glow without feeling greasy, which is harder to find than you’d think. It works well as both skincare and a makeup base, especially for dull or tired skin. Over time I’ve noticed a subtle brightening effect. The scent is sweet but fades quickly.

Recommends this product

Customer review from spacenk.com

mariaabegaelb_6830
6 months ago

Effective

Makes my skin supple and healthy looking. Very light and non-greasy. It does not have any scent and packaging is very elegant and easy to read. Good product!

Customer review from influenster.com

Patricia Cook
6 months ago
from Horseshoe Bend Arkansas

Love it

I’ve used this glycolic acid serum for a couple of years and my skin is glowing at age 64

Recommends this product

Customer review from macys.com

elena05_2940
7 months ago

KIEHL’S Glycolic Serum 30 ml

This lightweight serum has only 7 ingredients—and 9.8% pure glycolic acid. Here’s what I noticed after a few weeks: ✅ Skin felt smoother overnight ✅ Pores looked tighter ✅ Subtle glow without irritation ⚠️ Use slowly—this one’s potent! Perfect for oily, dull, or uneven skin. Not ideal for sensitive or reactive types. Worth it if you want real results—fast. 💡 Use at night, 2–3x/week. Always pair with SPF the next morning!

Customer review from influenster.com

ms_hijabi_8561
8 months ago

Definitely recommend

I have absolutely loved using this serum, this serum is formulated with only 7 ingredients, this serum helps to minimises the appearance of pores this serum also helps the skin to glow. This serum is suitable for sensitive skin and has a vegan formula. This serum has helped improve my skin texture, my skin is a lot more smoother, I love the packaging, the packaging can be recycled I would definitely repurchase.

Customer review from influenster.com

blushcoral_3705
9 months ago

If ur skin is stubborn try two layers

I use this serum to exfoliate my skin and also Sunday Riley skin good genes and I feel I can tell the difference in my pores and evened out skin tone. I usually drop two layers of glycolic acid serum and I get better results w it.

Customer review from influenster.com

External reviewer
10 months ago

Good

This works amazing! I love all their products. Nice finish, coverage. A lot of product and very affordable. Doesn’t really have a scent which I appreciate

Customer review from influenster.com

Harlemhead
10 months ago

Dark Marks Under Eyes Resolved

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

Customer review from kiehls.com