In January 2019 researchers from Iran published their review of the medical scientific literature to assess the associated between a dietary inflammatory index score and the risk of depression. A total of 12 studies were included in the review. Results showed that a diet with a higher dietary inflammatory score was associated with a higher risk of developing depression.
Kheirouri S et al. Dietary Inflammatory Potential and the Risk of Incident Depression in Adults: A Systematic Review. Adv Nutr. 2019 Jan 1;10(1):9-18