A steady gut-health reset that favors consistency over expensive testing.
Leigh Marotto treats gut recovery as a slow reset, and the key point lands cleanly: symptoms can ease before the microbiome is fully back on track.
The GutFit Nutrition Podcast
Leigh Merotto, Dietitian | IBS, Gut Health and Fitness Expert
50 episodes listed below
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In their own words
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!
As heard by us
Based on 6 episodes we listened to · September 2026
Leigh Merotto makes digestive symptoms more legible by connecting mechanisms, testing limits and practical decisions without flattening them into simple food rules.
The GutFit Nutrition Podcast turns digestive complaints into questions that can be examined rather than vague reasons to fear food. Leigh Merotto moves between solo explanation and guest conversation, tracing constipation, histamine reactions and nickel sensitivity through…
Why you'd press play
A daily bathroom trip isn't the whole story; Leigh Merotto asks whether you actually emptied out.
Press play if you want
- to understand why going every day may not settle the constipation question
- to hear how a nickel allergy can resemble IBS before you blame yet another meal
Talks about
Best episodes of The GutFit Nutrition Podcast
Short reviews from the PlayNext desk, based on the episodes we processed.
A practical microbiome primer that ties gut science to everyday hygiene choices.
The segment treats gut health as more than digestion. It links a diverse microbiome to mental health, neurotransmitter production, serotonin, and immune resilience, then keeps the advice grounded in everyday habits.
A practical case for earlier eating and fuller plates.
The episode treats weight loss as a matter of timing more than grit. Eating earlier in the day and narrowing the eating window may help with weight management by supporting metabolic efficiency and cutting down on late-night snacking.
Perimenopause is framed through gut health, with practical steps for tracking symptoms and talking to a doctor.
The episode treats perimenopause as more than a hormonal shift, linking the gut and the endocrine system in a way that makes the GI angle feel relevant rather than incidental.
A clear, evidence-first look at colorectal cancer risk, fiber, and research literacy.
This episode treats colorectal cancer risk as something worth understanding rather than fearing. It points to a 2018 meta-analysis showing that people with the lowest dietary fiber intake had a 21% higher risk of distal colon cancer and a 14% higher risk of proximal colon cancer…
A careful look at DAO deficiency, histamine buildup, and the uncertain line between histamine intolerance and mast cell activation syndrome.
The piece frames histamine intolerance as a practical, grounded idea: DAO deficiency may leave histamine less well broken down, and that excess may fit into the IBS picture.
A grounded look at how diet and lifestyle can shape colorectal cancer risk in younger people.
This episode treats younger-than-50 colorectal cancer as a question of habits and exposures as much as biology. It moves through processed food, weight gain, vitamin D deficiency, alcohol, smoking, and patterns that begin in childhood, then ties them back to the microbiome and…
A calm reset built around smiling, less scrolling, and more real-world connection.
Leigh Murado frames this episode around a plain idea: start the day with a smile, put the phone down for a while, and make room for screen-free time. The point is less about grand theory than about small habits that can shape the tone of a morning.
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Episodes
- 1
40: Colorectal Cancer Under 50? A Surgeon Breaks Down the Rise in Young People & How to Lower Risk
Lee Murado opens with a blunt question: why is colorectal cancer a concern for people younger than 50?
·49m·3 clips - 2
43: Breaking Down 4 Viral Gut Health Trends (Fibremaxxing, Aloe Vera, Beet Juice + Juice Fart Walks)
In this episode, host Leigh Merotto discusses the benefits of low to moderate intensity movement for improving gut health, including gas clearance and motility, while linking it to mood enhancement through the gut-brain connection.
·20m·1 clip - 3
42: 3 Ways to Improve Diet Diversity When Your IBS Makes You Scared of Food
This episode discusses the downsides of restrictive diets for IBS, explaining how they reduce gut microbiome diversity and can lead to harmful bacterial overgrowth.
·18m·1 clip - 4
44: Chronic Constipation? Common Culprits & What You Can Do About Them
Hidden gemLeigh Murado starts with the part a lot of people miss: bloating can come from stool burden sitting in the colon.
·37m·2 clips - 5
45: 3 Little Known Ways to Improve Your Microbiome Health (Puppies, Cleaning Products & more!)
Hidden gemLeigh Murado of The GutFit Nutrition Podcast explains three less obvious ways to support gut microbiome health: targeted hygiene, more natural environments, and short bursts of high-intensity exercise.
·30m·1 clip - 6
36: Runny Nose, Fatigue, Bloat, Rashes? Unpacking Histamine Intolerance & the IBS Link
Leigh Murado looks at histamine intolerance and where it may overlap with IBS.
·59m·6 clips - 7
50: Marathon Training: How to Prevent Gut Issues + Injury (Runner's GI Survival Guide)
·42m - 8
47: Nickel Allergy & IBS: The Connection You Need to Know
Hidden gemGut Fit Nutrition Episode 47 features registered dietitian Tamara Duker-Fruman discussing systemic nickel allergy syndrome (SNAS) as overlooked cause of IBS symptoms.
·44m·2 clips - 9
37: New Year, New Intentions: 9 Steps to Health and Fitness Goals You’ll Actually Stick With
Hidden gemLeigh Murado opens The GutFit Nutrition Podcast with a 2026 New Year episode built around 9 steps for sticking to health and fitness goals.
·32m·2 clips - 10
41: How Long Does it Take to "Fix" Your Gut Microbiome? (Antibiotics, IBS + More)
Hidden gemLeigh Marotto uses Episode 41 of The GutFit Nutrition Podcast to answer how long it takes to “fix” the gut microbiome after issues like antibiotic use and IBS.
·22m·1 clip - 11
35: Cortisol, Burnout and Adrenal Fatigue— What's Really Happening? Sifting Myth from Fact
Hidden gemThe GutFit Nutrition Podcast episode with Krista Bigler focuses on cortisol, burnout, and “adrenal fatigue,” with Lee Murado pressing for a clearer definition of what those terms mean in practice.
·1h 5m·4 clips - 12
49: My Top 8 Positivity Tools For Gut Health & Mental Health
Leigh Murado starts with smiling.
·29m - 13
46: Colon Cancer: Rising Rates & 5 Evidence Based Strategies to Lower Your Risk
Hidden gemLeigh Murado uses a short Gut Fit Nutrition Podcast episode to explain why colorectal cancer rates in adults under 50 are drawing attention, citing an American Cancer Society figure that colorectal cancer mortality has been rising 1.1% per year since 2005.
·37m·2 clips - 14
38: 5 Micro Habits to Level Up Your Gut Health in 2026
The episode turns gut health into a few micro habits for 2026.
·37m·2 clips - 15
39: IBS and Perimenopause — How Hormonal Changes Impact Gut Symptoms
Leigh Murado connects perimenopause with changing IBS symptoms.
·31m·2 clips - 16
48: Pursuing Weight Loss Without Wrecking Your Health: 6 Gut-Friendly Strategies
Leigh Murado starts with timing.
·25m·1 clip - 17
34: Why the Holidays Stir Up IBS Symptoms (and What You Can Do About It)
Dec 5, 2025·24m - 18
33: Eating to Improve IBS Through Your Microbiome
Nov 29, 2025·26m - 19
32: Which Probiotic Really Helps IBS? Here's What the Science Says
Nov 21, 2025·24m - 20
31: IBS Symptoms Disappear When You Travel to Europe? Let's Unpack Why
Nov 14, 2025·29m - 21
30: Is Underfuelling Wrecking Your Gut? Understanding RED-S and Low Energy Availability
Nov 7, 2025·52m - 22
29: High Intensity Training For a Happy Gut & Balanced Hormones
Nov 1, 2025·39m - 23
28: Beyond the Bloat — 6 Step Roadmap to IBS Relief (Masterclass Recap + Q&A)
Oct 23, 2025·35m - 24
27: 5 Things I Would Do If I Was Diagnosed With IBS Today
Oct 17, 2025·18m - 25
26: Struggling With IBS? 5 Things That Might Be Stopping You From Getting Better
Oct 10, 2025·22m - 26
25: Food Intolerances in IBS & How To Use Enzymes with Anouk Martini, Intoleran Dietitian
Oct 3, 2025·47m - 27
24: Understanding the Gastrocolic Reflex and Your IBS — Managing Urgency After Eating
Sep 26, 2025·11m - 28
23: Gut-Skin Connection — Healing Eczema and Fungal Skin Rashes Beyond Steroids & Medications
Sep 19, 2025·58m - 29
22: Are Marathons Linked to Colon Cancer Risk? What Runners Need to Know
Sep 12, 2025·16m - 30
21: Electrolytes for Gut Health & Performance: A Science-Based Guide for Active Bodies
Sep 6, 2025·19m - 31
20: Why Monash Serving Sizes Change — And How to Confidently Follow the Low FODMAP Diet With Dede Wilson
Aug 29, 2025·1h 1m - 32
19: Why Does Running Cause Gut Issues (And What Can You Do About It?)
Aug 22, 2025·21m - 33
18: Gut Health Testing: What’s Under & Overrated?
Aug 15, 2025·1h - 34
17: Morning Habits — What to Do First Thing for IBS & Bloating Relief
Aug 8, 2025·27m - 35
16: Gut Check: Is Your Microbiome Holding Back Your Fitness Goals?
Aug 1, 2025·1h 8m - 36
15: Bloat Culprits — Should I Skip Carbonated Drinks, Using a Straw, & Drinking Smoothies?
Jul 25, 2025·18m - 37
14: Training With Pelvic Floor Dysfunction – How to Build a Safe, Effective Plan
Jul 18, 2025·1h 15m - 38
13: Digestive Distress and Period Pain: The IBS–Endometriosis Link Explained
Jun 20, 2025·1h 10m - 39
12: Should I Use Digestive Enzymes For Meals That Could Trigger My IBS or Gut Symptoms?
Jun 13, 2025·9m - 40
11: Why Does Fibre Make my IBS Symptoms Worse?
Jun 6, 2025·8m - 41
10: Struggling to Hydrate and Always Have to Pee? Let's Talk Overactive Bladder (and the IBS Connection)
May 30, 2025·43m - 42
9: What's the Best Way to Diagnose IBS?
May 23, 2025·17m - 43
8: The Missing Link in PCOS — How Your Gut Microbes Influence Hormones
May 16, 2025·1h 6m - 44
7: Why Does Stress Make My IBS & Gut Symptoms Worse?
May 8, 2025·21m - 45
6: From Runner’s Gut to Race-Ready: How to Fuel Without GI Distress
May 2, 2025·52m - 46
5: IBS & Anxiety: Navigating This Common Connection With FODMAP Everyday
Apr 23, 2025·1h 2m - 47
4: Abdominal Massage & IBS — Hands on Healing For Visceral Sensitivity, Bloat & Constipation
Apr 18, 2025·48m - 48
3: Fatty Liver Disease & IBS? Here's How to Foster a Healthy Gut-Liver Axis
Apr 11, 2025·57m - 49
1: What is Gut Health? (And How to Know If Yours is In Top Shape)
Apr 4, 2025·22m - 50
2: Visceral Hypersensitivity & IBS With FODMAP Everyday
Apr 4, 2025·1h 1m