In this episode, we speak with gut microbiome researcher, Dr Matthew Snelson to unpack the fascinating and rapidly-evolving science of the microbes that live within our digestive system.
Together, we explore how the gut microbiome develops - from early life through adulthood - and the dietary factors that shape its composition.
Dr Snelson explains what current research tells us about dietary patterns that support a diverse and resilient microbiome, highlighting key nutrients and food groups that appear to promote beneficial microbial changes.
Finally, Matthew walks us through insights from a recent review paper examining the relationship between nut consumption and gut microbiome composition, discussing how nuts may influence microbial diversity and the production of beneficial metabolites.
This conversation offers a clear, evidence-based look at how everyday food choices can shape the ecosystem inside our gut - and what that can mean for overall health.
Key take-outs:
- The gut microbiome develops across the lifespan - our microbial community begins forming early in life and continues to evolve over time.
- Diet is one of the strongest modulators of the microbiome - dietary patterns rich in plant foods and fibre help support a more diverse and resilient microbial ecosystem.
- Nuts may support gut health - emerging research suggests that regular nut consumption can influence gut microbiome composition and may increase beneficial microbial activity.
- Everyday food choices matter - small, consistent dietary habits can shape the gut microbiome over time, with potential implications for overall metabolic and digestive health.
Access episode webpage: https://www.nutsforlife.com.au/resource/episode-58-diet-and-the-gut-microbiome/
About today's guest
Dr Matthew Snelson is an Advanced Accredited Practicing Dietitian and Vice Chancellor's Research Fellow in the Nutrition & Health Innovation Research Institute at Edith Cowan University.
He is interested in how dietary interventions can influence the prevention and management of chronic diseases - such as hypertension, heart failure, diabetes, and kidney disease - through modulation of gut homeostasis.
His work explores how nutrition-driven changes in the gut microbiome, intestinal permeability, and metabolic pathways can reduce disease risk and improve therapeutic outcomes.
Supporting resources
Cardiometabolic benefits of a non-industrialized-type diet are linked to gut microbiome modulation
https://www.cell.com/cell/fulltext/S0092-8674(24)01477-6
The impact of dietary fiber on gut microbiota in host health and disease
https://www.cell.com/cell-host-microbe/fulltext/S193131281830266X
Effects of nut intake on gut microbiome composition and gut function in adults: A systematic review and meta-analysis
https://www.sciencedirect.com/science/article/pii/S2161831325001012
Nutrition and the gut microbiome: a symbiotic dialogue influencing health and disease
https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2026.1761992/full
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Host: Belinda Neville
Contact us:
admin@nutsforlife.com.au
