CPS3, or the Cohort Study of the CPS-3, is a long-term research project aimed at understanding the links between lifestyle, environment, and health. It is part of the American Cancer Society’s efforts to gather data that can help reduce cancer risk and improve prevention strategies. Participants provide information about their health, habits, and environment over time. The study began in 2006 and involves a diverse group of volunteers from across the United States. By analyzing this data, researchers hope to identify factors that contribute to cancer and other diseases, ultimately leading to better health outcomes and public health recommendations.