Use the following zoom and pan buttons to control the image that follows them
Tab through the images or use the previous or next buttons to navigate each product image
Kiehl's Since 1851 Ultra Pure High-Potency 9.8% Glycolic Acid Serum
or
Offers
Use previous and next buttons to navigate the slides of the %1 Product Carousel
Earn points on this purchase.
Highlights
Summary
The Kiehl's Since 1851 Ultra Pure High-Potency 9.8% Glycolic Acid Serum is a concentrated facial serum formulated with just seven ingredients to help step up your smooth by visibly refining skin's texture and minimizing the appearance of pores.
Benefits
- Free of fragrance and colorants, this concentrated serum is minimally formulated for skin absorption and smoothing effect
Key Ingredients
- Glycolic Acid: a naturally occurring fruit acid derived from sugar cane known to help smooth skin
Research 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
Item 2607984
In the evening, apply 2 - 3 drops to clean, dry skin.
Try out Kiehl's Glycolic Acid serum skin hacks: Zone treat your face by applying Glycolic Acid Serum to areas prone to roughness. Follow with your favorite moisturizer where needed. Use as an exfoliating treatment for cracked heels. Layer with Kiehl's Hyaluronic Acid Serum to hydrate & rebalance skin's moisture. Layer with Kiehl's Niacinamide Serum to to reduce oil & sooth skin.
Aqua/Water, Glycolic Acid, Glycerin, Alcohol Denat., Sodium Hydroxide, Sodium Hyaluronate, Hydroxyethylcellulose.
This brand is excluded from most Ulta Beauty coupons.
Similar items for you
12 items
Use previous and next buttons to navigate the slides of the Similar items for you Product Carousel
We think you'll like
12 items
Use previous and next buttons to navigate the slides of the We think you'll like Product Carousel
Sponsored products
12 items
Use previous and next buttons to navigate the slides of the Sponsored products Product Carousel
Reviews
Review Snapshot
by PowerReviews
Ratings Distribution
Most Helpful Positive Review
Not for sensitive skin ...
Upon receiving this complimentary product, I was super excited to finally get a chance to try a Kiehl's brand product. The Kiehl's Ultra-Pure High Potency Serum 9.8% Glycolic Acid arrived in a semi-sturdy red and white branded package with black lettering. The serum is enclosed in a small glass bott...
Most Helpful Critical Review
Good ingredients but didn't work well for me personally
This is the second Kiehl's product I've tried and wanted to love but just didn't have success with. The ingredients are simple, the packaging is understated and clean, and the serum is clear and watery, so in theory I should have been able to layer it under my moisturizer. For me, the product was ve...
400 results
Feels good on the skin and makes it feel smooth
Submitted as part of a free sample program
Reviewed at
This was a great serum to help smoothen the feeling of skin. I felt hydrated and like the consistency of it. It felt a little bit "slimey" on my skin but nothing really to write home about compared to many other serums on the market. Overall good product, just very expensive.
Got compliments on my skin!!!
Submitted as part of a free sample program
Reviewed at
Super potent and blew me away! I tried this for about a month and it has definitely improved my skin a lot!! Compliments on my bare skin!!!

It was ok
Submitted as part of a free sample program
Reviewed at
It was decent. I didn't see too much results yet with the product but I will keep using it
Ok for sensitive skin
Submitted as part of a free sample program
Reviewed at
I really like this acid product. My skin is sensitive and I use tretinoin, to I have to be careful with the amount of acids I use. This stuff was so gentle on my skin. I love that I can put it on before bed at night. My skin felt fresh, clean, and smooth the next morning after I washed my face.
Glowy perfect skin texture
Submitted as part of a free sample program
Reviewed at
I received this product complimentary and I have sensitive skin but textured. In order to keep my skin looking fresh, I need to use AHAs and glycolic acid. I was pleasantly surprised by this product because it has diminished the pores and texture on my skin from continuous use of about a month. I can see the difference already. Best part is it does not irritate my skin or have a smell. I definitely recommend!