This Theracne active serum is for acne-prone skin providing effects from sebum cleansing to toning within 7 days. This product offers a 3 times stronger trouble index 275% improvement in skin texture 192% improvement in pores 7.6% reduction in keratin 16.9% reduction in sebum 4.7% improvement in pigmentation 34.5% reduction in pore area & 7.1% improvement in skin texture with just 7 days of use. In order to effectively improve troubled skin the Amorepacific research center's skin specialists have concentrated on the effectiveness of ZINC & BHA as necessitated in this product.