Explanations of specific cosmetic actives and types of products continues in Course 8. Sunscreen mechanisms and sunscreen actives are covered in detail. Ingredients designed to treat hyperpigmentation and their mechanisms are included. Antimicrobials and preservatives are explained as well as why they are required in cosmetic products. Integrating a regime of topicals with oral supplements is discussed as well as benefits and limitations of each. This course also includes the design of a comprehensive skincare regime that will meet individual client needs and preferences. It is important for the practitioner to elicit the cooperation of clients/patients. Factors influencing client/patient decision-making, response to practitioner recommendations, compliance, and reaction to marketing techniques are discussed.