Kiehl's gentle exfoliating Glycolic Acid facial serum is minimally formulated with only seven ingredients to visibly boost skin’s glow and visibly reduce the appearance of pores. Concentrated with 9.8% Glycolic Acid, our potent formula helps visibly refine skin’s texture for a smooth, glowing appearance. Free of fragrance and colorants, this concentrated serum is minimally formulated for skin absorption and smoothing effect.