The rising burden of chronic gastrointestinal diseases: the role of Mediterranean diet

Chronic gastrointestinal (GI) and metabolic diseases represent a growing global healthcare burden, heavily influenced by environmental factors and the exposome. This comprehensive review evaluates the therapeutic and preventative role of the Mediterranean diet (MD) as a potent non-pharmacological intervention in modulating gut health. A literature analysis was conducted focusing on the mechanisms of the MD—rich in polyphenols, monounsaturated fatty acids, and dietary fiber—and its clinical impact on pediatric Inflammatory Bowel Disease (IBD), gluten-related disorders, functional GI disorders, and Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD). The MD acts as a critical modulator of the gut microbiome, effectively reversing dysbiosis and promoting microbial diversity. Nutraceutical components of the diet significantly reduce systemic and localized inflammation by downregulating pro-inflammatory cytokines. Furthermore, the MD reinforces the gut epithelial barrier and enhances mucosal immunity. Clinical data demonstrate that high MD adherence correlates with reduced disease activity in pediatric IBD, improved symptom management in functional GI disorders, and attenuated hepatic steatosis and metabolic syndrome markers in MASLD patients. The Mediterranean diet serves as a powerful, evidence-based strategy for mitigating chronic gastrointestinal and metabolic disorders. By directly targeting dysbiosis and inflammation, it offers an effective lifestyle-based modulation tool to alleviate the rising clinical burden of modern digestive pathologies.