Integrating nutrition services into health care systems platforms: Where are we and where do we go from here.

Integrating maternal-child nutrition into health care services is a desirable but complex task that requires implementation research studies. This special supplement, entitled "How to Strengthen Nutrition into the Health Platform: Programmatic Evidence and Experience from Low- and Middle-Income Countries" presents a collection of mixed-methods research and case studies mostly conducted in sub-Saharan Africa that help us gain a better understanding of the barriers and facilitators for this integration to happen. Collectively, the evidence confirms that integrating nutrition services as part of health care systems and other platforms is feasible, but for that to be successful, there is a need to address strong barriers related to all six key health care systems building blocks identified by the World Health Organization. These include financing, health information systems, health workforce, supplies and technology, governance, and service delivery. Moving forward, it is crucial that more robust implementation science research is conducted within the rough and tumble of real-world programming to better understand how to best integrate and scale up nutrition services across health care systems and other platforms based on dynamic complex adaptive systems frameworks. This research can help better understand how the key health care systems building blocks need to interlock and communicate with each other to improve the policymakers' ability to integrate and scale up nutrition services in a more timely and cost-effective way.