Kiehl's targeted gentle facial peel is specifically formulated with 5.5% AHAs (glycolic acid and lactic acid), 0.18% Bha (salicylic acid) and 3.0% Pha (gluconolactone) to help reduce the appearance of pores, boost skin's radiance and create visibly softer and smoother skin texture. Balanced with soothing copper gluconate to help reduce discomfort, this formula provides a gentle exfoliating peel that can be used daily. At the Kiehl's labs, they tested the skin to see how deeply within its outer surface layer this targeted facial pre-serum penetrated to improve texture. More blue lines indicate a rougher skin texture that's less radiant and more uneven. After using Clearly Corrective Daily Re-Texturizing Triple Acid Peel, fewer blue lines show diminished rough texture for smoother, more radiant skin.