Show Notes
You treated the SIBO. You felt better. And then… the bloating came back.
Cue the internet: “It’s probably biofilm.”
But is it?
In this episode of Team Gut Girls, Dr. Christina Carew, Dr. Whitney Baxter, and Dr. Dominique Vanier dig into one of gut health’s buzziest—and most misunderstood—topics: biofilms. Biofilms are very real. They’re organized communities of microorganisms that build a protective matrix around themselves, communicate with one another, share resources, and may become harder for the immune system or antimicrobial treatments to reach. Think less “random bad bacteria” and more tiny gated microbial community—with infrastructure, neighbours, and apparently a very aggressive HOA.
The bigger question is whether biofilms are actually responsible for your bloating, recurrent SIBO, IBS symptoms, or treatment resistance.
We unpack what the research tells us, what remains theoretical, and why “my SIBO came back” doesn’t automatically equal “I need a biofilm disruptor.” Motility problems, constipation, pelvic floor dysfunction, abdominal phrenic dyssynergia, endometriosis, celiac disease, disorders of gut-brain interaction, and even an incorrect diagnosis can all keep symptoms cycling.
We also get into the biofilm treatments you’ve probably seen online—including NAC, enzymes, EDTA, bismuth, lumbrokinase, nattokinase, and serrapeptase—and why something that disrupts biofilm in a Petri dish doesn’t automatically translate into better bloating or IBS symptoms in an actual human.
And we need to talk about “die-off.” Feeling awful after starting a supplement isn’t proof that treatment is working. Diarrhea, rashes, fatigue, GI irritation, medication interactions, excessive dosing, and allergic reactions deserve attention—not a badge of honour for suffering through your protocol. Because when it comes to chronic gut symptoms, the better question may not be:
“What bacteria do I need to kill?”
It may be:
“What is happening in my gut ecosystem that allows this problem to keep coming back?”
What You’ll Learn
What a gut biofilm actually is—and why biofilms aren’t an alternative-health invention
How microbes form biofilms through attachment, maturation, communication, and dispersion
What quorum sensing means and how bacteria communicate inside their microbial communities
Why biofilms may make some microorganisms more persistent or difficult to eradicate
The possible connection between biofilms, bloating, IBS, dysbiosis, and recurrent SIBO
Why recurrent SIBO doesn’t automatically prove you have a problematic biofilm
How gut motility and constipation can contribute to SIBO recurrence
Why biofilms can contain multiple microorganisms rather than one single “bad bug”
Whether all biofilms are actually harmful (spoiler: no)
Why there currently isn’t a routine stool test that can reliably diagnose “biofilm-related bloating”
What we know—and don’t know—about NAC, enzymes, EDTA, bismuth, lumbrokinase, nattokinase, and serrapeptase
Why trying to “starve” biofilms by restricting minerals such as magnesium may backfire
The problem with assuming every bad reaction is Herxheimer or die-off
When persistent or treatment-resistant symptoms might make biofilms worth discussing with your healthcare provider
Biofilms may be one piece of the puzzle, especially when symptoms or infections repeatedly return despite appropriate treatment—but they’re rarely the whole puzzle.
More from Team Gut Girls
Could your bloating, constipation, fatigue, or stubbornly low iron be a clue to celiac disease—even if you’ve never had diarrhea? And if you’ve already gone gluten-free, can you trust a negative celiac blood test? In this episode of Team Gut Girls, Dr. Whitney Baxter, ND and Dr. Dominique Vanier, ND unpack three common celiac disease myths that can delay diagnosis and make gluten-free living more confusing than it needs to be. We explore why what you eat before testing matters, why celiac symptoms can extend well beyond the bathroom, and where gluten cross-contact deserves your attention. Shared toasters and crumb-filled peanut butter jars? Let’s talk. Your shampoo? A different conversation. In this episode, you’ll learn: • Why going gluten-free before testing can lead to a false-negative result • How celiac disease can show up as constipation, bloating, fatigue, iron deficiency, or symptoms outside the gut • What tTG-IgA and total IgA blood tests measure—and where an intestinal biopsy fits in • What to discuss with your healthcare provider if you’re already gluten-free • How family history and other autoimmune conditions can influence screening decisions • Which kitchen habits help reduce gluten cross-contact • Why ongoing symptoms after going gluten-free deserve another look You’ll also leave with practical questions to bring to your next appointment, so you can move from “Could gluten be the problem?” toward a clearer plan. RESOURCES Celiac Canada: https://www.celiac.ca More episodes and transcripts: https://www.teamgutgirls.com If this episode helped connect a few dots, follow or subscribe to Team Gut Girls and share it with someone navigating unexplained gut symptoms. Because better gut health changes everything. This podcast is for educational purposes only and does not replace individualized medical advice. Speak with your healthcare provider before changing your diet or starting a gluten challenge. If celiac disease is suspected, discuss testing before removing gluten.
Bloating, constipation, and that “I went, but I’m still not empty” feeling—could your pelvic floor be part of the puzzle? In this episode of Team Gut Girls, pelvic floor physiotherapist Susannah Stewart joins Dr. Whitney Baxter, Dr. Christina Carew, and Dr. Dominique Vanier to explore an often-overlooked connection in gut health: how your pelvic floor, diaphragm, abdominal muscles, and nervous system work together to help you poop—and what happens when that coordination gets disrupted. If you’re dealing with persistent bloating, straining, trapped gas, or incomplete bowel movements, this conversation offers a fresh perspective on what might deserve a closer look. And yes, you can poop every day and still have constipation. We unpack: How pelvic floor tension and difficulty relaxing can contribute to constipation and abdominal discomfort. Why stress, anxiety, and pain can influence bowel function. Toileting posture and habits that can make emptying easier. Pelvic organ prolapse and its potential role in incomplete evacuation. Dyssynergic defecation—when the muscles involved in pooping aren’t coordinating—and where biofeedback fits. Why “just do Kegels” isn’t helpful advice for every pelvic floor. What to expect from pelvic floor physiotherapy, including consent, comfort, and options beyond an internal exam. Postpartum body image, core recovery, and moving beyond pressure to “bounce back.” Expect practical insights, myth-busting, and an honest conversation about the things we don’t talk about nearly enough. Because understanding your bloating sometimes means looking a little farther south. Learn more and find episode transcripts at https://www.teamgutgirls.com. Follow Team Gut Girls for more conversations about gut health, hormones, and women’s health—and share this episode with someone who knows the frustration of a bathroom trip that feels unfinished. This episode is for education and does not replace individualized medical advice.
Should you take a probiotic for bloating? Are prebiotics better? And does a probiotic with 50 billion CFUs actually work better than one with 10 billion?
If you’re dealing with bloating, constipation, diarrhea, IBS, or other digestive symptoms, you may have wondered: Should I get a gut health test?
When Bloating, Bleeding & Indigestion Need a Closer Look