Kiehl's Since 1851 Ultra Pure High-Potency 9.8% Glycolic Acid Serum

Ultra Pure High-Potency 9.8% Glycolic Acid Serum - BenefitsFree of fragrance and colorants, this concentrated serum is minimally formulated for skin absorption and smoothing effectKey IngredientsGlycolic Acid is a naturally occurring fruit acid derived from sugar cane known to help smooth skinResearch ResultsAfter 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 - Ultra Pure High-Potency 9.8% Glycolic Acid Serum