Promotes exfoliation of the superficial layers of the epidermis, to prevent blockage of the pores. Also enhances collagen production. Liposoluble (soluble in oil). Frequently used for acne treatment. Anti-inflammatory and anti-bacterial action. Vichy Normaderm Nuit, Vichy Anti-Imperfection Active Concentrate, La Roche-Posay Effaclar K for Oily skin. La Roche-Posay Redermic Daily Fill-in Anti-wrinkle firming care.