Obagi CLENZIderm MD Starter Set Normal to Oily is the only prescription-strength acne treatment that contain a patented form of 5% benzoyl peroxide (BPO) to penetrate deep into the skin and treat acne where it starts. The solubilized form of 5% BPO in the CLENZIderm M.D. Systems is 1/10,000 the size of any other BPO product available, so it can treat acne where it starts, at the root.The Oily kit includes: 1 Daily Care Foaming Cleanser, 1 Pore Therapy and 1 Obagi Therapeutic Lotion.