It all starts with the skin. ZO is medical grade skin care created by world-renowned dermatologist, Dr. Zein Obagi. Dr. Obagi is known for his innovative approach to skin health. This is a recognized brand that focuses on science-backed, high-quality products designed to treat a variety of skin concerns, from acne and hyperpigmentation, to aging and sun damage. This helps patients attain and maintain skin health through the power of science. The full collection is available.