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

4.6 (360)
$34.00 (15% off) with code: FRIEND$40.00
Offers & perks
Free gift with purchase
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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
    • Enjoy a longer window to return most of your holiday purchases. See our Extended Holiday Return Policy to see if this item qualifies.
    • 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.

Ratings & 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
3 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
3 months ago
from Horseshoe Bend Arkansas
Did you read product reviews online before purchasing this item?No
Verified PurchaserYes

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

elena05_2940
3 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!

  • Photo from elena05_2940

Customer review from influenster.com

ms_hijabi_8561
4 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
5 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.

  • Photo from blushcoral_3705
  • Photo from blushcoral_3705

Customer review from influenster.com

External reviewer
7 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

  • Photo from External reviewer

Customer review from influenster.com

Harlemhead
7 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
7 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