The GutFit Nutrition Podcast

Leigh Merotto, Dietitian | IBS, Gut Health and Fitness Expert
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  • Nutrition
  • Updated weekly

Welcome to the GutFit Nutrition Podcast with Leigh Merotto, RD, MHSc—Registered Dietitian, gut health expert, and long-distance runner. This show is your go-to resource for all things gut health, IBS, and performance nutrition. Each episode delivers evidence-based tips, tools and strategies to help you tackle IBS and digestive symptoms, fuel running and fitness, and feel your best from the inside out. If you're ready to beat painful bloat and gut flare-ups, say goodbye to irregular poops, and thrive in your active life with whole body, REAL science-based tools — this is the show for you!

  1. 1 day ago

    64: Village of Eternity - 5 Blue Zone Longevity Lessons From an Italian Village

    What if one of the best lessons about longevity didn't come from a supplement or the latest wellness trend, but from a tiny medieval village in Italy? Whether you're struggling with longevity-marketing overwhelm, looking for expert guidance on simple, evidence-informed habits, or want practical strategies to bring blue zone principles into your own life, this episode has you covered. YOU'LL TAKEAWAY: ✅ 5 blue zone longevity lessons from Campodimele, Italy ✅ Why daily movement, local food, and community matter more than biohacking ✅ The "eat until 80% full" principle and why it supports digestion ✅ The specific foods (olive oil, beans, fish, antioxidant-rich vegetables) behind the local diet — 👩🏻‍💻 RESOURCES & LINKS MENTIONED: ⤵️ 📌 50 Secrets of the World's Longest Living People by Sally Beare — ✉️ CONNECT WITH ME: ⤵️ 📱 Follow on Instagram 🎁 Grab a Freebie! 🖥️ Shop the Resource Suite 👩🏻‍⚕️ Apply For Coaching — ENJOYING THE PODCAST? Your rating & review help this show get into the earbuds of more listeners navigating gut issues, IBS & fatigue. Scroll down in Apple Podcasts or Spotify, tap ⭐⭐⭐⭐⭐, and write one quick sentence. Not sure what to say? Try: "I listen to this podcast because…" 🎧

  2. 5 Sept

    63: 8 Conditions That Mimic IBS (and the Red Flags That Warrant Further Testing)

    Have you been told you have IBS, but something still doesn't feel right? Whether you're struggling with symptoms that won't improve no matter what you try, looking for expert guidance on when to ask for further testing, or want practical red flags to bring to your next doctor's appointment, this episode has you covered. YOU'LL TAKEAWAY: ✅ 8 conditions that commonly get mistaken for IBS ✅ The specific red flags that mean it's worth asking your doctor about further testing ✅ Why IBS is a real diagnosis, but not always the right one ✅ How to advocate for yourself if something doesn't feel right — 👩🏻‍💻 RESOURCES & LINKS MENTIONED: ⤵️ 🚀 Want personalized support to take control of IBS and reduce bloating and discomfort? 👉 Apply for 1:1 Coaching.  📌 Episode 40: Colon Cancer in Young People & How to Lower Your Risk 📌 Episode 60: Celiac Disease & Gluten Reactions 📌 Episode 61: IBS-D Mimickers 📌 Episode 13: Endometriosis & IBS Link — ✉️ CONNECT WITH ME: ⤵️ 📱 Follow on Instagram 🎁 Grab a Freebie! 🖥️ Shop the Resource Suite 👩🏻‍⚕️ Apply For Coaching — ENJOYING THE PODCAST? Your rating & review help this show get into the earbuds of more listeners navigating gut issues, IBS & fatigue. Scroll down in Apple Podcasts or Spotify, tap ⭐⭐⭐⭐⭐, and write one quick sentence. Not sure what to say? Try: "I listen to this podcast because…" 🎧

  3. 29 Aug

    62: 3 Mistakes Causing You to Race to the Bathroom During Your Runs

    Have you ever gone out for a run hoping to tackle a fast speed workout or a long run, only to have it completely derailed by multiple urgent trips to the bathroom? You did everything you thought was right with your nutrition, and your gut had other plans anyway. YOU’LL TAKEAWAY: ✅ The 3 most common mistakes causing GI issues and bathroom emergencies during runs ✅ How fat, fiber, and FODMAPs can each trigger urgency and loose stools ✅ What "gut training" actually means and why the mismatch between training and race day causes problems ✅ How fecal loading and constipation can be the real root cause of "runner's diarrhea" — 👩🏻‍💻 RESOURCES & LINKS MENTIONED: ⤵️ 📌 Running For Pancreatic Cancer North America 🚀 Want personalized support to crush your PBs without a cranky gut? Apply for 1:1 Coaching  — ✉️ CONNECT WITH ME: ⤵️ 📱 Follow on Instagram 🎁 Grab a Freebie! 🖥️ Shop the Resource Suite — ENJOYING THE PODCAST? Your rating & review help this show get into the earbuds of more listeners navigating gut issues, IBS & fatigue. Scroll down in Apple Podcasts or Spotify, tap ⭐⭐⭐⭐⭐, and write one quick sentence. Not sure what to say? Try: "I listen to this podcast because…" 🎧

  4. 18 Jul

    61: Could Your IBS-D Be Misdiagnosed? Bile Acid Diarrhea, Microscopic Colitis & More

    Could your IBS-D actually be something else? Many people living with chronic diarrhea are told they have IBS, but for some, an underlying condition may be missed. Today, we discussed the most common IBS-D mimickers, the red flags that shouldn't be ignored, and the testing that may help uncover the real cause of ongoing digestive symptoms! YOU’LL TAKEAWAY:  ✅ Why proper diagnosis is essential before assuming it's "just IBS" ✅ The most common causes of chronic diarrhea that mimic IBS ✅ SIBO, bile acid malabsorption, microscopic colitis, pancreatic insufficiency, celiac disease and more ✅ Red flags that warrant further investigation ✅ The evidence-based tests that are often overlooked ✅ How to advocate for yourself if your symptoms aren't improving & signs your condition probably isn’t IBS! — 👤 TODAY’S GUEST: Jessica Roocroft Jessica is a Registered Dietitian specializing in IBS-D (IBS with diarrhea) and chronic diarrhea. With a focused, evidence-based approach, she helps clients overcome urgent, unpredictable, and life-disrupting diarrhea symptoms without resorting to overly restrictive diets.  Her passion for this work stems from personal experience navigating chronic digestive symptoms, bloating, and random diarrhea attacks despite repeatedly receiving normal test results. Frustrated by the lack of answers available to patients, she dedicated her practice to helping others uncover the root causes of their symptoms.  📌 Chronic Diarrhea Testing Checklist 📌 Jessica’s Instagram — 👩🏻‍💻 REFERENCES & LINKS MENTIONED: ⤵️ 📌 New Rome V IBS diagnostic criteria 📌https://pubmed.ncbi.nlm.nih.gov/31917991/ — ✉️ CONNECT WITH ME: ⤵️ 📱⁠⁠⁠⁠Follow on Instagram⁠⁠⁠ 🎁 ⁠⁠⁠Grab a Freebie!⁠⁠⁠  🖥️ ⁠⁠ Shop the Resource Suite⁠⁠⁠ 👩🏻‍⚕️ ⁠⁠⁠Apply For Coaching⁠⁠⁠ — ENJOYING THE PODCAST? Your rating & review help this show get into the earbuds of more listeners navigating gut issues, IBS & fatigue. Scroll down in Apple Podcasts or Spotify, tap ⭐⭐⭐⭐⭐, and write one quick sentence. Not sure what to say? Try: “I listen to this podcast because…” 🎧

  5. 10 Jul

    60: Celiac Disease — Symptoms You Could Be Missing, IBS Link & More With Selena Devries RD

    There is a lot of confusion about gluten in the gut health world. If you’ve been navigating gut issues for a while, you may have tried a gluten free diet or perhaps done a low FODMAP diet that involves limiting many foods with gluten like regular bread and pasta.  While intolerance to gluten can exist on a spectrum, a very real and life changing disease that requires a strict, life long gluten free diet is Celiac Disease.  If you’ve been living with celiac disease, or you suspect gluten might be a culprit in your digestive issues.. You’re going to want to tune into today’s episode!  YOU’LL TAKEAWAY:  ✅ What celiac disease is, and the difference between gluten sensitivity and fructan intolerance ✅ A typical day in the life of someone with celiac disease ✅ Link between celiac disease and IBS ✅ Top tools for navigating celiac disease in 2026 — 👤 TODAY’S GUEST: Selena Devries Selena is a Registered Dietitian, Celiac Disease Health Coach, and the founder of Celiac Made Simple. As someone living with celiac disease herself, she brings both professional expertise and personal experience to her work.  She is a graduate of the University of British Columbia and has completed Monash University training in the Low FODMAP Diet. For more than 10 years, she has specialized in helping people navigate life with celiac disease through her online private practice. 📌 Selena’s Website 📌 Selena’s Instagram — 👩🏻‍💻 RESOURCES & LINKS MENTIONED: ⤵️ 📌 Celiac Disease Foundation  📌 Episode 47 – Nickel Allergy & Ibs.  📌 Play-Doh, Gluten Cross Contact & Celiac Disease Study 📌 Kissing, Gluten Cross Contact & Celiac Disease Study — ✉️ CONNECT WITH ME: ⤵️ 📱⁠⁠⁠⁠Follow on Instagram⁠⁠⁠ 🎁 ⁠⁠⁠Grab a Freebie!⁠⁠⁠  🖥️ ⁠⁠ Shop the Resource Suite⁠⁠⁠ 👩🏻‍⚕️ ⁠⁠⁠Apply For Coaching⁠⁠⁠ — ENJOYING THE PODCAST? Your rating & review help this show get into the earbuds of more listeners navigating gut issues, IBS & fatigue. Scroll down in Apple Podcasts or Spotify, tap ⭐⭐⭐⭐⭐, and write one quick sentence. Not sure what to say? Try: “I listen to this podcast because…” 🎧

  6. 4 Jul

    59: Boston Marathon PB With Zero GI Issues — Cindy's Story

    Does it feel like gut issues or digestive stress show up at the worst possible time in your training or on race day? If you’re a runner who has ever worried about how your gut might react during a race, I think you’re really going to relate to today’s episode. I’m excited to introduce you to my guest, Cindy. Cindy is a client of mine and an incredible example of what can happen when a runner dials in their fuelling strategy and builds confidence in their gut. After dealing with fueling and digestive challenges that were impacting her racing, Cindy made some key changes that helped her run a personal best at the Boston Marathon. YOU’LL TAKEAWAY:  ✅  Cindy’s running journey and how the Running Realtor brand first came to life ✅ The fueling and gut challenges she was experiencing leading up to the Boston Marathon ✅ The key changes she made with her fueling strategy and race preparation ✅ What race week and race day looked like when she ran her Boston Marathon personal best — 👤 TODAY’S GUEST: Cindy Gallant Cindy Gallant is a Toronto-based realtor and endurance runner known as “The Running Realtor,” balancing a busy real estate career with a genuine love for running and an active lifestyle. Rooted in Toronto’s west end, she helps buyers, sellers, landlords, tenants, and investors navigate the real estate market with honesty, patience, and a practical, no-pressure approach. 📌 Follow The Running Realtor for Toronto real estate insights, running routes, and grab Cindy's FREE Toronto Real Estate & Lifestyle Guide (link in bio). @therunningrealtor_to 📌 Follow Cindy on the Move for marathon training, race recaps, travel adventures, and everyday running inspiration. @cindyonthemove  — 👩🏻‍💻 RESOURCES & LINKS MENTIONED: ⤵️ 🚀 Want personalized support to crush your racing + gut health goals too? 👉Apply for 1:1 Coaching — ✉️ CONNECT WITH ME: ⤵️ 📱⁠⁠⁠⁠Follow on Instagram⁠⁠⁠ 🎁 ⁠⁠⁠Grab a Freebie!⁠⁠⁠  🖥️ ⁠⁠ Shop the Resource Suite⁠⁠⁠ — ENJOYING THE PODCAST? Your rating & review help this show get into the earbuds of more listeners navigating gut issues & endurance goals. Scroll down in Apple Podcasts or Spotify, tap ⭐⭐⭐⭐⭐, and write one quick sentence. Not sure what to say? Try: “I listen to this podcast because…” 🎧

  7. 27 Jun

    58: Hyrox Race Recap — Nutrition, Performance & GI Support

    In this episode, I’m taking you behind the scenes of my full Ottawa Hyrox race weekend, 2 days out all the way through race day and recovering after as a gut health Dietitian and endurance athlete.  The thing with endurance athletes including both long distance runners and hyrox athletes is that they often mismanage their carb load, or try something new on race day… and that’s where things can go sideways fast, especially for those of us with sensitive guts YOU’LL TAKEAWAY:  ✅ Race prep and strategy to ensure we stayed calm & confident  ✅ How I structured my carb load (without triggering symptoms) ✅  My exact race day fuelling plan—including carbs, hydration, and caffeine – for an evening race  ✅  The gut-friendly strategies that kept everything calm on race day ✅  And how I approached recovery to bounce back quickly — 👩🏻‍💻 RESOURCES & LINKS MENTIONED: ⤵️ 📌 Tune in Next: Milan Marathon Recap 🚀 Want personalized support?Apply for 1:1 Coaching (IBS, Gut Health + Performance).  — ✉️ CONNECT WITH ME: ⤵️ 📱⁠⁠⁠⁠Follow on Instagram⁠⁠⁠ 🎁 ⁠⁠⁠Grab a Freebie!⁠⁠⁠  🖥️ ⁠⁠ Shop the Resource Suite⁠⁠⁠ — ENJOYING THE PODCAST? Your rating & review help this show get into the earbuds of more listeners navigating gut issues, IBS & fatigue. Scroll down in Apple Podcasts or Spotify, tap ⭐⭐⭐⭐⭐, and write one quick sentence. Not sure what to say? Try: “I listen to this podcast because…” 🎧

  8. 19 Jun

    57: Can You Trust AI For IBS & Gut Health Advice?

    While AI can be a helpful tool, it lacks the clinical experience to make nutrition therapy recommendations, regulation and accountability and ability to assess safety of a recommendation. In today’s episode, we will discuss the main risks and considerations with using AI for health advice, and some key takeaways to use it safely should you choose to engage in AI based tools for your IBS and gut health management.  YOU’LL TAKEAWAY:  ✅ The main downsides to using AI for gut health & IBS advice (lack of regularity, lack of context, data collection & hallucinations) ✅ Why data collection with these large language models (LLM) is something you need to be aware of ✅ How lack of context can result in misleading or dangerous health information  ✅ How to navigate information online & use these tools more judiciously should you choose to — 👩🏻‍💻 REFERENCES: ⤵️ https://cloud.google.com/discover/what-are-ai-hallucinations https://www.dietitians.ca/About/Learn-About-Dietitians https://hai.stanford.edu/news/be-careful-what-you-tell-your-ai-chatbot https://arxiv.org/abs/2509.05382 https://pmc.ncbi.nlm.nih.gov/articles/PMC12735979/#sec3-nutrients-17-03828 https://pmc.ncbi.nlm.nih.gov/articles/PMC13244121/ https://www.psychologytoday.com/ca/blog/dancing-with-the-devil/202506/how-emotional-manipulation-causes-chatgpt-psychosis https://www.cma.ca/healthcare-for-real/can-you-trust-ai-health-advice — ✉️ CONNECT WITH ME: ⤵️ 📱⁠⁠⁠⁠Follow on Instagram⁠⁠⁠ 🎁 ⁠⁠⁠Grab a Freebie!⁠⁠⁠  🖥️ ⁠⁠ Shop the Resource Suite⁠⁠⁠ 👩🏻‍⚕️ ⁠⁠⁠Apply For Coaching⁠⁠⁠ — ENJOYING THE PODCAST? Your rating & review help this show get into the earbuds of more listeners navigating gut issues, IBS & fatigue. Scroll down in Apple Podcasts or Spotify, tap ⭐⭐⭐⭐⭐, and write one quick sentence. Not sure what to say? Try: “I listen to this podcast because…” 🎧

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About

Welcome to the GutFit Nutrition Podcast with Leigh Merotto, RD, MHSc—Registered Dietitian, gut health expert, and long-distance runner. This show is your go-to resource for all things gut health, IBS, and performance nutrition. Each episode delivers evidence-based tips, tools and strategies to help you tackle IBS and digestive symptoms, fuel running and fitness, and feel your best from the inside out. If you're ready to beat painful bloat and gut flare-ups, say goodbye to irregular poops, and thrive in your active life with whole body, REAL science-based tools — this is the show for you!

Information

  • Creator
    Leigh Merotto, Dietitian | IBS, Gut Health and Fitness Expert
  • Years Active
    2025 - 2026
  • Episodes
    64
  • Rating
    Clean
  • Copyright
    © Leigh Merotto, Dietitian | IBS, Gut Health and Fitness Expert
  • Show Website
    The GutFit Nutrition Podcast

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