Functional dyspepsia (FD) and gastroparesis (GP) are chronic upper gastrointestinal disorders in which symptoms are closely linked to food intake. However, dietary interventions remain insufficiently studied, and the clinical overlap between the two conditions poses challenges for study design and interpretation. This review summarizes current evidence on the impact of eating behaviors, specific diets and food items, and macronutrient composition on symptom generation in FD and GP, and considers how these findings may inform nutritional management strategies. While emerging data suggest potential dietary approaches, evidence-based recommendations remain limited. Well-designed randomized controlled trials with standardized diagnostic criteria, validated outcome measures, and integration of physiological biomarkers are urgently needed to establish effective, individualized dietary interventions for these disorders.

Dyspepsia

Functional dyspepsia

Nausea

Vomiting

Gastroparesis

Diet

Treatment

© 2025 The Authors. Published by Elsevier Ltd.