
Sigma Nutrition Radio
#607: Gut Health & Microbiome Testing: What Evidence Do We Actually Have? – Emily Leeming, PhD
New
26 May 2026 · 50 min
Nutrition basicsGut health
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About this episode
Gut health has become a major focus in nutrition, medicine, and consumer wellness, but the term is often used loosely. Claims about microbiome testing, probiotics, fermented foods, fibre, and "boosting" the gut microbiome are now common, yet the evidence behind these claims varies substantially. In this episode, Dr. Emily Leeming examines what gut health actually refers to, why it cannot be reduced to the microbiome alone, and where current microbiome science is being applied before it is ready.