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Kiehl's Since 1851 Ultra Pure High-Potency 9.8% Glycolic Acid Serum
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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.
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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
10/10!!
Submitted as part of a free sample program
Reviewed at
I Chose to take a break from retinol for a while, and this stepped right into its place! I am obsessed! I will be repurchasing!!
Smooth Texture
Submitted as part of a free sample program
Reviewed at
This Kiehl's Ultra Pure High-Potency Serum 9.8% Glycolic Acid is okay for my skin type (combination, hyperpigmentation, and sensitive skin). I have been applying this product twice a week followed by a moisturizer. The texture of the product feels smooth and soaks right into the skin making my face feel supple. I love that the product has only 7 ingredients. However, in the few weeks I've been using this product I have not seen any noticeable differences in my hyperpigmentation scars. Additionally, this product leaves a burning sensation if there are any micro cuts or fresh pimples.

Worth trying!
Submitted as part of a free sample program
Reviewed at
I was nervous to try this because "high potency" and "9.8%" had me concerned that this product would burn. I personally didn't have any issues at all. This serum is light-weight with a watery texture and doesn't have a scent. I haven't used it long enough to determine if it is truly effective, but I really like this brand and would definitely give this product a try if you're looking for a glycolic acid.
Love this!
Submitted as part of a free sample program
Reviewed at
I found this to be such a nice serum! I have very sensitive skin, so I was very worried going into this sample. However, that worry is no more. Though there was a stinging when I applied this, it didn't last for long. I was a slight bit red in the cheeks, but I expected that. It's not too sticky, very blendable, and doesn't smell much. My skin feels so good!
CVPS
Submitted as part of a free sample program
Reviewed at
This serum gives me the skin I have always crave. Soft, subtle and glowy!
