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I'm Alyssa Simpson, a Registered Dietitian specializing in digestive health. This podcast is for people with IBS, SIBO, and other stomach issues to learn how to calm their symptoms and improve their gut health using natural solutions like diet, supplements, and lifestyle changes.
97 Episodes
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Send a text Fiber is everywhere right now. It’s being praised as the answer for gut health, blood sugar, cholesterol, hormones, and weight regulation, often all at once. And yet, for many people, actually trying to eat more fiber leads to the opposite of what they expected: bloating, discomfort, gas, or pain. In this episode, Alyssa unpacks why the conversation around fiber has become so confusing, and why so many well-intentioned people feel worse when they follow generic “eat more fiber” ad...
Send a text In this episode, Alyssa takes the conversation around hydrogen sulfide SIBO one level deeper. She shares how hydrogen sulfide SIBO is actually approached in practice, and why jumping ahead, whether to antimicrobials, binders, or protocols, often makes symptoms worse instead of better. Rather than focusing on “what to take,” Alyssa breaks down the sequence that matters: Why clarity has to come before treatmentWhy symptom calming isn’t the same as healing (but still matters)Why moti...
Send us a text Have you ever looked at your plate and thought, “I’m eating less than ever… so why is my weight going up?” If you’ve tried low-FODMAP, cut sugar and carbs, cleaned up your diet, and somehow feel heavier, slower, and more inflamed, this episode is for you. In this episode, Alyssa dives into one of the most confusing and overlooked patterns in gut health: why some people with SIBO experience weight gain instead of weight loss, and why everything you’ve been told to do might actua...
Send us a text In this episode of The Gut Health Dialogues Podcast, Alyssa Simpson sits down with her client Doug, who shares his powerful journey from being house-bound and limited to a “safe” diet of chicken and rice, to reclaiming his gut health, his confidence, and his life. What started as a frustrating case of “IBS with no answers” turned out to be Hydrogen Sulfide SIBO, a form of small intestinal bacterial overgrowth that’s often missed on standard breath tests and misdiagnosed as IBS,...
Send us a text In this episode, Alyssa Simpson unpacks a common yet widely misunderstood subtype of small intestinal bacterial overgrowth (SIBO): hydrogen sulfide SIBO. Many people with this pattern have spent years chasing answers, trying diets like low FODMAP, gluten-free, or low-carb, cycling through symptom management, and being told tests are normal, only to feel worse, confused, or convinced there’s no solution in sight. Alyssa breaks down: What hydrogen sulfide SIBO is and isn’tWhy it ...
Send us a text Have you tried low FODMAP, gluten-free, dairy-free, or elimination diets and still feel sick after eating? In this episode, Alyssa Simpson breaks down one of the most confusing and misunderstood nutrition strategies in gut health: the low sulfur diet. This is not an episode about cutting out “bad foods” or following another restrictive diet forever. Instead, Alyssa explains why a short, strategic low-sulfur diet trial can be a powerful clarity tool for people who feel deeply un...
Send us a text Eating out with food allergies, celiac disease, IBS, or food sensitivities can feel overwhelming — and sometimes unsafe. In this episode, Alyssa Simpson chats with Dylan McDonnell, founder of Foodini, about how technology and regulation are finally making restaurant dining safer and more transparent. Dylan shares his personal experience growing up with celiac disease and how it inspired him to create Foodini: a platform that gives diners real ingredient and allergen data so the...
Send us a text The holidays are the most wonderful time of the year. But for many people, they’re also a perfect storm of stress, irregular routines, rich meals, travel, and unpredictable digestion. In this holiday special episode, Alyssa Simpson teams up with Dr. Ali Navidi (clinical psychologist & gut–brain specialist) to unpack why stress shows up so strongly in the gut, especially for people with IBS, chronic constipation, bloating, and functional digestive disorders. Together, they e...
Send us a text In this episode, Alyssa explains what fatty liver actually means, why it’s more common than most people think, and why it’s fundamentally a metabolic problem tied to insulin resistance, sugar, and inflammation. Most importantly for her gut-sensitive audience, Alyssa explains how to begin reversing fatty liver with simple, sustainable real-food shifts and how to do it without making gut symptoms worse (SIBO, bloating, constipation). Resources mentioned in this episode: Download ...
Send us a text In this episode, Alyssa sits down with Dr. Joy Ostroff, a Hawaii-based naturopathic doctor with over three decades of clinical experience, for a powerful conversation on the REAL root causes of stubborn weight that diets never address. Dr. Joy explains why weight struggles are rarely about willpower or calories and are almost always linked to deeper imbalances in the gut, hormones, detox pathways, and nervous system. She breaks down how issues like candida overgrowth, biofilm f...
Send us a text In this episode, Alyssa unpacks a connection that many people don’t realize is at the heart of their gut health struggles: the tight interplay between constipation, liver overload, and sleep disruption. If you wake up between 1–3 AM, feel sluggish, bloated, or totally backed up the next day, this episode is for you. In this episode, Alyssa explains the powerful (and often overlooked) link between constipation, liver stress, and sleep disruption, and how real food and simple rit...
Send us a text In this episode, Alyssa breaks down one of the biggest myths in wellness: that your body needs a “cleanse” or “detox tea” to reset. If you’ve ever skipped meals, done a juice fast, or spent money on detox kits, thinking you’re helping your liver and gut, this one’s for you. Alyssa explains what actually happens to your digestion, metabolism, and liver when you restrict food and why those “gut resets” can backfire, leaving you feeling more bloated, fatigued, and inflamed.&...
Send us a text In this episode, host Alyssa Simpson opens up the mess of conflicting diet advice many with methane SIBO face: low FODMAP, low carb, low fiber, and gives you a clear, real-world eating plan built for methane-dominant SIBO (IMO). She shares what really works, what often fails, and how to shift from feeling stuck in symptom chaos to feeling intentional and nourished again. Resources mentioned: Download the Methane SIBO Diet Plan: a 7-day guide to calm bloating and reset your gut ...
Send us a text If you’ve done everything right, low FODMAP, antibiotics, supplements, and your methane SIBO symptoms (bloating, constipation, stomach discomfort) still come back, this episode will give you the answers you’ve been looking for. Alyssa walks listeners through her six-step framework for methane SIBO recovery, explaining why antibiotics alone or diet tweaks only scratch the surface. From the gut-brain connection to root cause mapping, this conversation goes beyond symptom ma...
Send us a text If you’ve been eating “perfectly,” taking your probiotics, and still feel bloated, backed up, or uncomfortable, you might be dealing with Methane SIBO, also known as Intestinal Methanogen Overgrowth (IMO), a commonly missed diagnosis that’s keeping your gut stuck in slow motion. In this episode, Alyssa Simpson breaks down: What Methane SIBO actually is and how it’s different from hydrogen SIBOWhy it causes bloating, constipation, and sluggish digestionHow stress, surgeries, and...
Send us a text In this episode, Alyssa Simpson is joined by Nikki D’Agostino, a nervous system retraining specialist, to dive deep into Primal Trust, a program built on neuroplasticity, somatic practices, and trauma healing. They explore how chronic stress, limbic system impairment, and unconscious trauma can lock your body and brain into survival mode, interfering with digestion, nutrient absorption, immune function, and overall healing. You will get clarity on: Why gut healing often stalls ...
Send us a text In this episode, Alyssa Simpson breaks down one of the most confusing gut health struggles: why nourishing foods like vegetables, lentils, or garlic can suddenly trigger bloating, gas, cramping, or flare-ups. Alyssa explains the surprising reasons behind this — from gut inflammation and bacterial overgrowth (like SIBO) to histamine intolerance, food sensitivities, and sluggish digestion. More importantly, she shares practical, hope-filled strategies you can use right now ...
Send us a text In this episode of The Gut Health Dialogues, Alyssa Simpson sits down with Dr. Diana Driscoll—optometrist, researcher, and author of The Driscoll Theory—to uncover connections between gut health, vagus nerve dysfunction, chronic inflammation, and conditions like POTS, SIBO, long COVID, and Ehlers-Danlos Syndrome. Dr. Driscoll shares her journey from being incapacitated by illness to discovering root causes medicine often misses. She explains how vagus nerve dysfunction affects ...
Send us a text If you’ve tried more fiber, magnesium, MiraLAX, and water—but you’re still backed up—this episode is for you. Alyssa dives deep into constipation, busts myths, and shows what really moves the needle when your gut is sluggish. She covers why “healthy” foods can sometimes make things worse, what your gut actually needs to start moving, and small shifts in timing, hydration, and food pairings that can bring real relief. What you’ll learn in this episode: Which foods (even “h...
Send us a text Histamine intolerance might feel like the final answer, but what if it’s really just the tip of the iceberg? In this episode, Alyssa sits down with Jennifer Fugo, MS, LDN, CNS — a clinical nutritionist and host of the Healthy Skin Show — to uncover the real root causes behind histamine intolerance and chronic skin issues. They uncover why antihistamines don’t always help, why low histamine diets often fail long-term, and what hidden root causes could be driving your sympt...
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