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Inside Matters

Inside Matters

By: Dr James McIlroy
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The gut health show – conversations with the most forward-thinking minds in health, fitness, science, nutrition and business. In-depth discussions about how our gut microbiome impacts our health, well-being, mood and more.

Inside Matters was conceived by microbiome expert Dr James McIlroy as a platform to raise awareness of the importance of the gut microbiome. Our aim is to inspire and educate listeners around the world about the importance of gut health, equipping them with the knowledge they need to transform their lives for the better.

Produced by the Podcast Studio Glasgow.

Copyright 2022 All rights reserved. Exercise & Fitness Fitness, Diet & Nutrition Hygiene & Healthy Living
Episodes
  • The Importance of the Reproductive Tract Microbiome: Insights from David MacIntyre

    The Importance of the Reproductive Tract Microbiome: Insights from David MacIntyre
    Apr 2 2026
    For years, the spotlight in microbiome research has been firmly on the gut. We’ve learned that diversity there is generally a good thing—linked to resilience, health, and better outcomes. But what if one of the most important microbiomes in the body follows completely different rules? In a recent conversation, Dr James McIlroy sat down with Professor David MacIntyre, Director of the Robinson Research Institute, to explore a rapidly emerging field: the female reproductive tract microbiome. What they uncovered challenges many assumptions—and could transform how we think about pregnancy, birth, and early life health. 00:00 Show Returns 01:34 Why Reproductive Microbiome 05:15 Low Diversity Health 09:24 Lactobacillus Protection 12:06 Human Uniqueness 14:17 Population Differences 16:31 Oral Probiotics Myth 19:25 Vaginal Biotherapeutics Trial 22:11 Host Immune Response 27:03 Dysbiosis Triggers 30:42 Microbiome and Preterm Birth 33:06 Labor Inflammation Pathways 38:10 Pregnancy Microbiome Shifts 39:11 Screening and Group B Strep 40:57 Microbiome Screening Potential 42:06 Global Data Predictive Signatures 43:23 Limits of Current Risk Tools 45:30 Point of Care Profiling Vision 46:50 Swab Mass Spec Barcoding 48:27 Composition Versus Host Response 49:58 Metabolic Dark Matter 52:13 Beyond Bacteria, Viruses, and Fungi 55:48 Vaginal Probiotic Trials 57:39 Phase Two Trial Endpoints 01:01:28 Vaginal Microbiome Transplants 01:05:46 Birth Seeding After C Section 01:10:57 Do Vaginal Strains Persist 01:14:05 Ten-Year Personalised Medicine 01:17:45 Wrap Up And Where To Find A Different Kind of Microbiome When we talk about the gut microbiome, diversity is often considered a hallmark of health. The reproductive tract? It’s the opposite. In healthy women, this environment is typically: Low in diversityDominated by one key group of bacteria: Lactobacillus This might sound counterintuitive—but it’s by design. Why low diversity works here Certain Lactobacillus species—particularly Lactobacillus crispatus—play a protective role by: Producing lactic acid, keeping the environment acidic (around pH 4)Preventing harmful microbes from growingBlocking pathogens from attaching to tissueProducing antimicrobial compounds In short, they create a stable, protective ecosystem. When this balance is disrupted and diversity increases, it’s often linked to: InfectionInflammationPoor reproductive outcomes A Unique Human Feature One of the most surprising insights? Humans are the only species known to have a Lactobacillus-dominated reproductive microbiome. Even our closest primate relatives don’t share this feature. That suggests this system evolved relatively recently—and likely offers a meaningful biological advantage, particularly in pregnancy and childbirth. The Link to Preterm Birth Preterm birth—defined as delivery before 37 weeks—affects around 1 in 10 pregnancies globally and remains a major medical challenge. The microbiome appears to play a key role, particularly in early preterm births. What’s happening biologically? In a healthy pregnancy, labour is triggered by controlled, sterile inflammationThis process helps: Break the membranes (waters)Open the cervixInitiate contractions But if inflammation starts too early, it can trigger premature labour. Where the microbiome fits in A Lactobacillus-dominant microbiome helps: Keep inflammation lowMaintain a strong mucosal barrierReduce infection risk When this balance is lost: The environment becomes less acidicInflammatory molecules increaseThe barrier weakensRisk of infection—and preterm labour—rises Once inflammation starts, it’s very difficult to switch off. That’s why prevention is so important. What Disrupts the Balance? Several factors can shift the microbiome away from its protective state: Antibiotics (even when used for unrelated infections)Sexual transmission of bacteriaHormonal changesMenstruationHygiene practices like douching Even small changes in pH or environment can allow harmful bacteria to gain a foothold. Can We Predict Risk Earlier? One of the most exciting areas of research is using the microbiome as a predictive tool. Scientists are working towards: Identifying microbial “signatures” linked to higher riskMeasuring both: Which microbes are presentHow the body is responding to them New technologies can now analyse a simple swab and generate a metabolic “barcode” in minutes—potentially enabling rapid screening. The long-term vision? Routine testing that identifies at-risk pregnancies early—before symptoms appear. Can We Change the Microbiome? If we can measure it, can we fix it? 1. Oral probiotics: limited impact Despite widespread marketing, there’s little evidence that oral probiotics reliably reach or colonise the reproductive tract. They may have indirect benefits—but they’re not an efficient delivery method. 2. Targeted vaginal probiotics More promising is direct delivery of ...
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    1 hr and 19 mins
  • Gut Health, Celiac Disease & the Future of Microbiome Medicine — With Dr Debra Silberg

    Gut Health, Celiac Disease & the Future of Microbiome Medicine — With Dr Debra Silberg
    Dec 4 2025

    Dr Debra Silberg joins Inside Matters for a deep, wide-ranging conversation on gut health, drug development, and the future of microbiome therapeutics.

    Dr Silberg is the Chief Scientific Officer at Beyond Celiac, a former global clinical leader at Shire/Takeda and AstraZeneca, and one of the most respected figures in GI medicine and microbiome science.

    In this episode, we explore: • How she moved from basic science to medicine to pharma leadership • Why the GI field needed so much research — and how it transformed • The real science behind ulcers, H. pylori, and the Barry Marshall story • What she teaches in her popular “Understanding Your Gut” course • Prebiotics vs probiotics — what actually matters • The truth about gluten, celiac disease, gluten sensitivity and rising incidence • The microbiome’s role in inflammation, autoimmune disease, mental health & IBS • Whether microbiome drug development is finally turning a corner • Why the gut–brain axis may be the most exciting frontier in medicine

    Dr Silberg also shares insights from her work with Finch Therapeutics, her role at Beyond Celiac, and her experience advising the team at Biotics.

    If you’re interested in gut science, the microbiome, diet, or how modern medicines are built from the ground up, you’ll get a huge amount from this conversation.

    Be well, trust your gut — and thanks for listening.

    00:00 Introduction to Dr Debra Silberg

    00:54 Dr Silberg's Career Journey

    02:26 Insights on Gut Health and Microbiome

    04:05 Understanding GI Diseases and Treatments

    07:41 The Role of Diet in Gut Health

    15:59 Celiac Disease and Gluten Sensitivity

    25:04 Exploring the Microbiome

    27:43 Exploring Therapeutic Approaches to the Microbiota

    31:36 Challenges in Microbiome Drug Development

    34:22 The Gut-Brain Connection and Mental Health

    39:13 Transitioning from Academia to Pharma

    41:45 Insights into Drug Development and Success Stories

    44:55 The Long Journey of Drug Development

    52:01 The Role of AI in FDA Reviews

    55:04 Quick Fire Round: Future of Microbiome Research

    You must not rely on the information in this video as an alternative to medical advice from your doctor or other professional healthcare provider. If you have any specific questions about any medical matter you should consult your doctor or other professional healthcare provider. If you think you may be suffering from any medical condition you should seek immediate medical attention. You should never delay seeking medical advice, disregard medical advice, or discontinue medical treatment because of the information in this video.
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    59 mins
  • Unlocking Gut Health: FMT, MicroRNAs, and the Future with Dr Tanya Mongan

    Unlocking Gut Health: FMT, MicroRNAs, and the Future with Dr Tanya Mongan
    Nov 20 2025

    In this episode, Dr James McIlroy chats with Dr Tanya Mongan, clinical associate professor and gastroenterology consultant at the University of Nottingham. Dr Mongan specialises in gut health, particularly the gut–brain connection and faecal microbiota transplantation (FMT).

    She talks us through the current state of FMT, why it works so well, and how it’s becoming an increasingly important treatment for conditions like inflammatory bowel disease. We also explore her cutting-edge research into microRNA-based medicines—a new field examining tiny molecules that can help protect the gut and may one day be used to treat conditions linked to an unhealthy microbiome, including cystic fibrosis and neurodegenerative diseases.

    This episode breaks down the complexities of the microbiome in an easy-to-understand way, covering everything from the limits of current testing to the promise of personalised gut treatments. Dr Mongan also shares insights into exciting new tools such as organ-on-chip models, nano-delivery systems for microRNAs, and even zebrafish models used in gut research.

    If you want to understand where gut science is heading, what’s real and what’s hype, and how future therapies may become more precise and personalised, this is a must-listen.

    Chapter Markers

    00:00 Introduction to Dr Tanya Mongan and gut health 01:51 Has the microbiome “bubble” burst? 03:45 The big challenges in microbiome science 06:13 What the future of microbiome testing could look like 12:45 Understanding faecal microbiota transplantation (FMT) 19:22 How FMT works and what current research shows 26:29 Why the microbiome is so complex 34:57 MicroRNAs: a new frontier in gut health 37:41 Where microRNAs come from 38:18 How microRNAs help protect the gut 39:00 Why delivering microRNAs is difficult 39:19 Nano-formulation: new ways to deliver microRNAs 40:37 The advantages of organ-on-chip models 42:02 Personalised “gut avatars” 43:58 Zebrafish and other models used in gut research 49:27 Clinical applications and future directions 53:17 Microbiome therapy and FMT in clinical practice 56:57 The future of microbiome research and treatment 01:01:23 Diet, supplements, and the microbiome 01:04:34 Weight-loss drugs and how they affect the microbiome 01:07:52 Fascinating facts about the microbiome 01:09:24 Final thoughts and wrap-up
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    1 hr and 10 mins
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