This paper (J.Nutr.139:2365–2372,2009) 'A New Dietary Inflammatory Index Predicts Interval Changes in Serum High-Sensitivity C-Reactive Protein' explains what this is about & lists foods and constituents included in the inflammatory index DII. They used a literature search to link six inflammatory markers (cytokines)with foods associated with their increase or decrease and there is evidence of a regulatory function.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2777480/