IBS Diet: Low-FODMAP, Soluble Fiber, and What the Evidence Shows
Diet is one of the most powerful levers for IBS symptom management — but the evidence is more nuanced than "follow the low-FODMAP diet." This section covers the key dietary approaches supported by research, how the low-FODMAP protocol works in practice, the role of soluble fiber, and why individual testing remains essential.
What the evidence shows:
The low-FODMAP diet has the strongest evidence base for IBS symptom reduction — with multiple RCTs showing benefit in 50–75% of patients. But it's a short-term elimination protocol, not a permanent diet. The reintroduction phase, where you identify which FODMAP subgroups you personally react to, is what makes it work long-term.
Detailed dietary guidance coming soon
We're building out comprehensive content covering the full low-FODMAP protocol, soluble vs. insoluble fiber, the role of gut microbiome diversity, exclusion diets beyond FODMAP, and how to approach IBS diet changes without guidance from a dietitian. In the meantime, GutDiaries already helps you log your food and symptoms to track how different dietary patterns affect your gut.
What this section will cover
- → The low-FODMAP protocol — elimination, reintroduction, and long-term personalisation
- → Soluble fiber — why it helps for IBS-C and IBS-D alike, and good sources
- → Meal timing and eating patterns — regular meals, portion size, and eating speed
- → Gluten and IBS — non-coeliac gluten sensitivity vs. FODMAP content in wheat
- → Working with a dietitian — why professional guidance matters for elimination protocols
Track your IBS diet — free
GutDiaries logs your meals and symptoms to help you identify your personal FODMAP tolerances and dietary patterns — without needing a dietitian for every step.
