“…Diet may directly or indirectly influence anxiety development through several mechanisms, for which chronic inflammation serves as a common substrate, such as those involved in the production and metabolism of neurotransmitters and the microbiome-gut-brain axis (MGBA) [ 7 , 8 , 9 ]. To date, with the use of the dietary inflammatory index (DII ® ), several studies have evaluated the inflammatory potential of the diet in association with anxiety symptoms, generating inconsistent findings [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. All these studies have been cross-sectional or case-control in design, limiting inferences about causality, especially when the association between diet and mental disorders is complex and likely to be bidirectional [ 5 ].…”