61. SIBO Case Study: Bloating, Constipation, IBS & Histamine

Bloating, constipation, and food reactions after food poisoning—could SIBO be part of the picture? In this episode of The Histamine Well Podcast, Joanne walks through a real patient case of small intestinal bacterial overgrowth (SIBO), exploring persistent digestive symptoms, a methane-positive breath test, and suspected histamine-related reactions. The patient had experienced significant bloating, nausea, reflux, constipation and brain fog, with probiotics making her bloating worse. Despite seeing several practitioners, she had not been assessed for SIBO. Joanne shares the clues that prompted testing, why she prioritised a SIBO breath test over stool microbiome testing in this case, and how she introduced a SIBO low-histamine diet and personalised digestive support. At her first follow-up, the patient reported an 80% reduction in bloating, alongside improvements in nausea, reflux and heartburn. With constipation still an issue, Joanne explains the next adjustments to her care and why retesting remained part of the plan. In this episode, you’ll hear: The patient’s symptom history following food poisoning. Joanne’s reasoning behind targeted SIBO testing. How the methane-positive result informed her approach to constipation. The dietary changes and digestive support used initially. How Joanne adjusted the plan as symptoms improved. Her plans for follow-up, retesting and food reintroduction. Whether you’re experiencing ongoing gut symptoms or supporting patients in clinical practice, this episode offers a practical look at Joanne’s assessment and treatment decisions. ✨ Want more? Follow on Instagram, Facebook, and YouTube for updates and tips. 📘 New to this journey? Buy The Ultimate Bundle for Managing Histamine Intolerance—your step-by-step guide to manage your histamine intolerance effectively.  🧪 Curious about your methylation status? Try our at-home Methylation Test! In just 15 minutes, discover if you're over-methylating or under-methylating and receive targeted supplement recommendations to help rebalance. Use code HISTAMINEWELL10 for 10% off. 🎓 Practitioner or student? Join the waitlist for the Histamine & Methylation Online Group Coaching Course starting early 2026! 📆 Work with us 1:1! Book a consultation and take your first step to real healing. 🎤 Have a topic suggestion? Submit it here!