AC.Net 3%It\'s mainly used for oily and acne-prone skin. It is a combination of oleanolic acid and nordihydroguaiaretic acid in an osmotic gel. It helps inhibit the excessive growth of keratinocyte, controls the secretion of sebum, and prevents bacteria.Zn-PCA 1%It is an essential trace element to the human immune system. Zn-PCA, its amino acid derivative, slows down excessive sebaceous activities to keep pores clean and prevent infection that causes whiteheads and blackheads. It also has antibacterial and antifungal properties that help treat acne for oily skin.