Intervention Summary
Adherence to the Alternate Mediterranean Diet (AMED) pattern — high in fiber, polyphenols, omega-3 fatty acids, and plant-based foods — as both a preventive and post-diagnosis survival strategy. This is the only dietary pattern with direct overall survival data in OC.
Evidence
Prospective Cohort (Chen 2024)
- Design: Prospective cohort with pre- and post-diagnosis dietary assessment
- Key outcome: High AMED intake: HR = 0.59 (95% CI 0.38-0.90) for overall survival
- Trajectory matters: Decreased AMED intake from pre- to post-diagnosis linked to worse survival; maintaining consistently high AMED associated with benefit
- Source: [1]
Preclinical Support (AlHilli 2025)
- High-fat and ketogenic diets accelerated EOC tumor growth in mice, reduced gut diversity, and upregulated polyamine biosynthesis (tumor-promoting pathway)
- Low-fat/high-carbohydrate diet maintained higher diversity and distinct protective taxa
- Source: [2]
Mechanism
- Microbiome diversity preservation: Mediterranean diet maintains microbial alpha-diversity, which is significantly reduced in OC tumor tissue (P=0.0215)
- SCFA production support: High fiber content feeds depleted butyrate producers
- Anti-inflammatory: Polyphenols and omega-3s reduce the inflammatory tumor microenvironment driven by Gram-negative bacteria and LPS
- Polyamine suppression: Avoids the polyamine biosynthesis upregulation seen with high-fat/ketogenic diets
- Metal chelation: Polyphenols in Mediterranean diet chelate iron and copper, potentially reducing Fenton chemistry
Clinical Context
The trajectory finding is critical: patients who decrease dietary quality after OC diagnosis have worse outcomes. This argues for active dietary counseling as part of OC treatment protocols, not just prevention.