Table 2.

Databases and websites searched, search terms and inclusion/exclusion criteria

Search	Databases/institutional websites	Search terms
Scholarly literature	PubMed, Scopus, ProQuest, Web of Science	Nutrition-related: diet*, food*, hunger, micronutrient deficienc*, nourish*, *nutrition*, obesity, overweight, stunting, underweight, wasting Political commitment related: accountabilit*, advoca*, agenda*, capacit*, collective action, commit*, coordination, enabling environment*, govern*, politic*, policy, policies, priorit*, stewardship, strateg*
Grey literature	Eldis; Food and Agriculture Organization of the United Nations; Institute for Development Studies; International Food Policy Research Institute; International Fund for Agricultural Development; Oxfam International; Save the Children; Scaling-up Nutrition; United Nations Children’s Fund; United Nations Standing Committee on Nutrition; World Bank; World Food Programme; World Health Organization.
Inclusion and exclusion criteria
Studies were included if:	Published after 1990 in English. Published in a peer-reviewed journal or by an official organisation or non-government organisation with a mandate to address malnutrition. Identified and described factors shaping political commitment for nutrition at national and/or subnational levels. Involved an empirical analysis with clearly described aims, explicit use of theory or description of underlying assumptions, a clear study design and methodology including data sources, coherent statement of findings and justifiable conclusions.
Studies were excluded if:	Non-empirical (eg, commentaries, conceptual frameworks, calls to action). Focused on specific institutional (eg, school, prisons and workplaces) or clinical policy-settings (ie, not at jurisdictional level).

*Truncated to capture all variations of the word (eg, *nutrition* captures malnutrition, overnutrition and undernutrition).