The World Health Organization defines Health in All Policies (HiAP) as:

“…an approach to public policies across sectors that systematically takes into account the health implications of decisions, seeks synergies, and avoids harmful health impacts, in order to improve population health and health equity. 
“A Health in All Policies approach is founded on health-related rights and obligations. It improves accountability of policymakers for health impacts at all levels of policymaking. It includes an emphasis on the consequences of public policies on health systems, determinants of health, and well-being. It also contributes to sustainable development.”

http://www.who.int/healthpromotion/frameworkforcountryaction/en/ 

Resources:

WHO: Health in All Policies: Framework for Country Action
This framework provides countries with a practical means of enhancing a coherent approach to Health in All Policies (HiAP), particularly at a national level.

 

 

 

Health in All Policies: A Guide for State and Local Governments

This guide was was created by the American Public Health Association, Public Health Institute and the California Department of Public Health to support state and local guvernment leaders who want to use intersectional collaboration to promote health.