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

4.6 (360)
$40.00
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Product details

Web ID: 15795952
A concentrated facial serum formulated with just seven ingredients (aqua/water, glycolic acid, glycerin, alcohol denat., sodium hydroxide, sodium hyaluronate and hydroxyethylcellulose) to help step up your smooth by visibly refining skin's texture and minimizing the appearance of pores.

  • Product Features

    • WHAT IT IS:
    • A serum with 9.8% glycolic acid
    • WHAT IT DOES:
    • Helps visibly refine and smooth skin's texture and boost skin's glow
    • INGREDIENT HIGHLIGHTS:
    • Glycolic acid, a fruit acid derived from sugar cane, helps smooth skin
    • SKIN TYPES:
    • For all skin types, including sensitive skin
    • HOW TO USE:
    • In the evening, apply 2-3 drops to clean, dry skin
    • Skin Hacks:
    • Zone treat your face by applying the serum to areas prone to roughness and following with your favorite moisturizer where needed
    • Use the serum as an exfoliating treatment for cracked heels
    • Layer with the Hyaluronic Acid Serum to hydrate and rebalance skin's moisture
    • Layer with the Niacinamide Serum to reduce oil and soothe skin
    • RESULTS:
    • Instantly, texture is refined*
    • After 1 week, skin feels softer*
    • Smoother skin in 1 week**
    • *Based on reports by consumers in a 4-week study
    • **Based on expert grading in a 4-week clinical study

  • Shipping & Returns

    • This item qualifies for Free Shipping with minimum purchase! exclusions & details
    • California and Minnesota customers call 1-800-289-6229 for Free Shipping information.
    • For complete details, see our Shipping and Returns policies.
    • Please call customer service for returns.
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    Ultra Pure High-Potency 9.8% Glycolic Acid Serum, 1 oz.

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Item 4 of 4

Ratings & Reviews

Here's what customers think
  • This serum is reported to significantly improve skin texture, smoothness, and brightness, with some users noting reduced pore size and acne.
  • It is described as gentle, absorbing well without leaving a sticky or drying residue.
  • While a few customers experienced some initial irritation or sensitivity, most found the product to be a valuable addition to their skincare routine, providing noticeable results within a few weeks of consistent use.
AI-generated summary from 356 customers reviews.
4.6/5

360 star ratings, 356 reviews

Write a Review
68.9% of reviews have 5 stars
248
23.3% of reviews have 4 stars
84
5.3% of reviews have 3 stars
19
1.1% of reviews have 2 stars
4
1.4% of reviews have 1 star
5

39 customer images

356 reviews
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
Did you read product reviews online before purchasing this item?No

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

Helpful?
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
8 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

Bayareaperson
10 months ago
from San Francisco
Incentivized review

Clears me up

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