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Nutrition · Leigh Merotto, Dietitian | IBS, Gut Health and Fitness Expert

The GutFit Nutrition Podcast

by Leigh Merotto, Dietitian | IBS, Gut Health and Fitness Expert

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!

Latest episodes

Showing 20 · updated from the feed

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 stru

Sep 12
33 min

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 ex

Sep 5
27 min

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 di

Aug 29
35 min

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,

Jul 18
57 min

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

Jul 10
53 min

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 yo

Jul 4
44 min

58: HYROX Nutrition Strategy — My Approach as a Gut Health Dietitian

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 Dieti

Jun 27
32 min

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

Jun 19
31 min

56: Your 6-Step IBS Relief Plan (Masterclass Recap & Q/A)

In this episode, I’m recapping highlights from my live masterclass, Break Free From IBS: Your 6-Step Roadmap to Lasting Relief.  If you missed it, don’t worry! I’ve pull

Jun 12
42 min

55: Finding Food Freedom With IBS — Angela's Story

Does it feel like your IBS and gut symptoms run your life? I can’t wait to share about my guest and today’s inspiring episode.  Angela is an amazing client of mine who i

Jun 6
1 h 08 min

54: Non-Linear Goals: Breaking 20 Minutes in the 5K (Nutrition, Recovery & Mindset)

On November 24th, 2025, at the Holly Jolly Fun Run in Toronto, I ran 5 kilometres in under 20 minutes. It was a goal I set for myself over a year and a half before I rea

May 29
41 min

53: Milan Marathon Recap: Race Day, Fuelling & Digestive Support

In this episode, I’m taking you behind the scenes of my full Milan marathon weekend,  from the final days of tapering and carb loading to race morning, fueling during the

May 22
42 min

52: Why Your Gut Changes in Your 40s (and What to Do About It) With Nicole Dynan RD

If you’re in your early 40s or beyond and noticing more bloating, constipation, or unpredictable IBS symptoms, your hormones may be playing a bigger role than you think.

May 15
43 min

51: IBS and Travel: 7 Hidden Triggers (and How to Prevent Flare-Ups)

If you have IBS or struggle with persistent gut issues, you’ve probably noticed that travel often leads to flare ups. For those with severe IBS, even short day trips can

May 8
35 min

50: Marathon Training: How to Prevent Gut Issues + Injury (Runner's GI Survival Guide)

Struggling with gut issues during marathon training? From bloating and reflux to urgent bathroom stops mid-run, digestive issues affect up to 50% of endurance athletes—an

Mar 27
41 min

49: Top 8 Positivity Tools For Anxiety, Mood & Gut Health

If you’ve been feeling anxious, overwhelmed, or mentally drained lately, this episode is for you. As a Registered Dietitian specializing in gut health, I’m diving into t

Mar 21
28 min

48: Can Your Gut Microbiome Impact Your Weight? 6 Gut Friendly Tools For Sustainable Weight Loss

Trying to seek weight loss goals without sacrificing energy, your health and tanking your metabolism? In this episode, I’m sharing 6 practical tips to stay healthy while

Mar 13
25 min

47: Nickel Allergy & IBS: The Connection You Need to Know

If your IBS symptoms aren’t improving on a low FODMAP diet, there may be an overlooked trigger: nickel. In this episode, we explore the interesting connection between Nic

Mar 6
43 min

46: Colon Cancer: Rising Rates & 5 Evidence Based Strategies to Lower Your Risk

Colorectal cancer is rising, especially early-onset colon cancer in adults under 50. But the good news is that much of your risk is modifiable. In this evidence-based ep

Feb 28
37 min

45: 3 Little Known Ways to Improve Your Microbiome Health (Puppies, Cleaning Products & more!)

Your gut health isn’t just about what you eat! In this episode, I’m sharing 3 little-known, evidence supported ways to improve your gut microbiome that go beyond diet — a

Feb 20
29 min

Chart trend

Position in the Nutrition chart (US), last 90 days.

#119
all-time peak
41
days in the top 200 since Aug 2025

Chart positions

Where The GutFit Nutrition Podcast ranks today in each Apple Podcasts chart (US, Sep 17, 2026).

#193 NEW Nutrition US

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