The report provides advice to policymakers about designing and implementing restrictions around marketing food and non-alcoholic beverages high in fat, sugar and salt (HFSS) to children. This includes how to use a rights-based approach and overcome challenges such as industry interference and policy inertia. It seeks to equip policymakers with overarching guidance on how to design robust restrictions of marketing HFSS food and non-alcoholic beverages to children and highlights that protecting children from harmful marketing practices is a human rights issue. Case studies are included throughout the report from countries that are in the process of implementing, or have already implemented, policies restricting the marketing of HFSS foods or beverages to children.