This document presents Québec’s Governmental Health Prevention Policy as a concrete example of Health in All Policies (HiAP). It outlines its origins, objectives, governance structures, implementation mechanisms, achievements, funding sources, and evaluation tools. Prepared by the Canadian Network for Health in All Policies, this summary is part of a series of cases showcasing the diversity of HiAP initiatives across Canada. Targeted at public health professionals and other actors interested in HiAP, its purpose is to enhance knowledge, highlight innovative practices, and foster the sharing of experiences and ideas on a national scale.