The GutFit Nutrition Podcast

Leigh Merotto, Dietitian | IBS, Gut Health and Fitness Expert
  • 5.0 (2)
  • 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. 4d ago

    67: Carbohydrate Intolerances in IBS: FODMAPs, Sucrase-Isomaltase Deficiency & Enzymes

    FODMAPs are a tool, not a lifelong restrictive diet. Whether you're struggling to figure out which carbohydrates your gut really can't handle, looking for expert guidance on a guided FODMAP reintroduction, or want practical strategies for knowing when enzymes and tests are (and aren't) worth it, this episode has you covered. YOU'LL TAKEAWAY: ✅ Why IBS makes the gut so reactive to carbohydrates, and what FODMAP elimination and reintroduction really look like ✅ Sucrase-isomaltase deficiency (CSID): the lesser-known intolerance that can make a low FODMAP diet fall flat ✅ How a carbohydrate intolerance can be properly assessed — and which tests to skip ✅ Where enzyme products like lactase, Fodzyme, and alpha-galactosidase may help — 👤 TODAY'S GUEST: Jessica Roocroft, RD Jessica is a Registered Dietitian based in North Vancouver, BC, and the founder of Jess Nourishes, where she runs a signature online program for IBS-D. She's Monash University FODMAP-trained, and her own experience navigating chronic digestive symptoms and frustratingly normal test results led her to focus her practice on helping others find answers and regain confidence around food and their gut. 📌 Website 📌 Instagram — 👩🏻‍💻 RESOURCES & LINKS MENTIONED: ⤵️ 🎁 Sponsor: BioGaia Gastrus Pure Action probiotic for IBS (abdominal pain, gas, bloating) — use code GUTFIT20 for 20% off on Amazon 🚀 Want to say goodbye to bloating without endless food restrictions? Join the FREE Training 👉 How to Heal Your IBS Without a Life Long Low FODMAP Diet! — ✉️ 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. Sep 25

    66: Cancer Nutrition: How Inflammation, Gut Health & Immunity Intersect

    Does diet and nutrition make a meaningful difference in cancer treatment, recovery, and reducing your risk of recurrence? Whether you're currently in treatment, navigating survivorship, or supporting a loved one through it, this episode has you covered. YOU'LL TAKEAWAY: ✅ How inflammation, gut health, and immunity intersect to influence cancer risk and outcomes ✅ Why there's no single "cancer diet" once you're in active treatment ✅ The real, nuanced relationship between sugar and cancer ✅ What the research shows about intermittent fasting during treatment and survivorship — 👤 TODAY'S GUEST: Jean LaMantia, RD Jean is a Toronto-based registered dietitian, cancer survivor, and author of three books on cancer, lymphedema, and intermittent fasting, including The Essential Cancer Treatment Nutrition Guide and Cookbook. She was diagnosed with Hodgkin lymphoma at age 27, and now works with clients across Canada and the US to help them navigate nutrition through cancer treatment, survivorship, and lymphedema management. 📌 Website 📌 Instagram — 👩🏻‍💻 RESOURCES & LINKS MENTIONED: ⤵️ 📌 Jean's free Cancer Risk Reduction Guide 📌 The Essential Cancer Treatment Nutrition Guide and Cookbook — ✉️ 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. Sep 19

    65: Under- and Overrated Sports Supplements for Runners

    Is that supplement actually doing anything, or is it just an expensive habit? Whether you're struggling with GI issues on the run, looking for expert guidance on which sports supplements are worth your money, or want practical strategies to fuel your training without a flare-up, this episode has you covered. YOU'LL TAKEAWAY: ✅ Which supplements are backed by strong research (and which are riding hype alone) ✅ How to weigh a small performance edge against real GI risk ✅ Dietitian's three-question framework for vetting any new supplement ✅ GI-friendly ways to use creatine, bicarb, tart cherry, beetroot, and more — 👤 TODAY'S GUEST: Amy Goblirsch, the Running Dietitian Amy is a registered dietitian specializing in marathon and endurance performance nutrition, with firsthand experience across nine marathons and a 100-mile ultramarathon she completed one year postpartum while breastfeeding! She helps runners stop fearing food and start using it to fuel their training. 📌 Website 📌 Instagram — 👩🏻‍💻 RESOURCES & LINKS MENTIONED: ⤵️ 📌 Examine.com — independent supplement research reviews 💡 Ready to take it further? Get my Pre & Post Workout for a Happy Gut Mini Course + Resource Bundle — ✉️ 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…" 🎧

  4. Sep 12

    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…" 🎧

  5. Sep 5

    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…" 🎧

  6. Aug 29

    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…" 🎧

  7. Jul 18

    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…” 🎧

  8. Jul 10

    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…” 🎧

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Ratings & Reviews

5
out of 5
2 Ratings

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
    67
  • Rating
    Clean
  • Copyright
    © Leigh Merotto, Dietitian | IBS, Gut Health and Fitness Expert
  • Show Website
    The GutFit Nutrition Podcast

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