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

What it is: An ultra-pure glycolic acid serum that will smooth and even skin.

Who it's for: Ideal for normal skin types.

How to use: Apply 4 to 5 drops to clean, dry skin in the evening. Layer with other serums as needed. Can be used once a day.

Paraben-free; phthalate-free; sulfate-free; silicone-free; fragrance-free; oil-free Made in the USA Item #7505936