Meat intake in relation to composition and function of gut microbiota

Area of Science:

• Microbiome research
• Nutritional science
• Human health

Background:

• Meat consumption is linked to chronic diseases.
• Gut microbiome composition may be influenced by diet.
• Understanding meat-microbiome interactions is crucial for public health.

Purpose of the Study:

• To identify gut microbiome features associated with meat intake.
• To investigate the link between meat consumption and host factors.
• To explore the impact of different meat types on gut microbiota.

Main Methods:

• Deep shotgun metagenomics sequencing of gut microbiota in 9669 individuals.
• Food frequency questionnaires to assess white, unprocessed red, and processed red meat intake.
• Statistical analysis using linear regression to test associations with microbial diversity, abundance, gene function, and host biomarkers.

Main Results:

• Processed red meat intake correlated with reduced alpha microbial diversity.
• Meat intake associated with specific gut microbial species and pathways (e.g., amino acid degradation).
• Associations observed between processed red meat, microbial metabolites (e.g., TMAO, creatine), and clinical biomarkers (e.g., insulin, glucose, triglycerides).

Conclusions:

• Meat intake, especially processed red meat, significantly modifies gut microbiota composition and functional capacity.
• These modifications are linked to alterations in health-related biomarkers.
• Findings suggest a potential mechanism linking processed meat consumption to chronic disease risk via the gut microbiome.