Table 2 Eligibility criteria used for record screening

• Full-text peer-reviewed articles from any country or region, that are available in English. All methods and study designs will be considered; and

• Corruption-related literature referring to or focusing on food systems (including papers that have subsections looking at corruption in the specific food system context).

• Clinical populations (i.e., diabetes, cardiovascular disease, etc.), non-human studies, physical science context (i.e., cellular and genetic studies, assays, laboratory setting, analytical food testing or detection techniques).

• Corruptive strategies or psychological theory (i.e., bribery as a parental feeding strategy or foundations of corruptive behavior like greed); papers that were not focused on the food system and corruption; corruption of tools or technical processes.

• Grey literature, editorials, book chapters, conference proceedings, commentaries, letters, reviews theoretical modelling studies.

• Based on data collected before 1986. The start date was chosen as this was the year the Ottawa Charter was released, recommending a focus on healthy public policy as an effective strategy for health promotion.