Onion
High FODMAP riskWhy this food shows up for IBS
FODMAP note: Fructans. Fermentable carbs can draw water into the gut and produce gas, driving IBS pain and altered bowel habits. Onion tolerance is dose-dependent — Monash-style portions help you keep flavor without crossing your symptom line. Stack fewer triggers in the same meal when symptoms are active.
FODMAP lens
Patterns people associate with this food
- Bloating, gas, or urgency within hours
- Cramping that tracks with high-FODMAP meals
- Loose stools or constipation cycles after triggers
How to test it in real life
Start from a low-FODMAP baseline, then reintroduce in measured portions to find your limit.
Related foods
On the Sensio blog
Onions and IBS: Why This Cooking Staple Destroys Your Gut →Log meals & symptoms in Sensio
Reference pages show population-level patterns — the app is where your personal timeline reveals what actually affects your skin or gut.
Quick answers
- FODMAP note: Fructans. Fermentable carbs can draw water into the gut and produce gas, driving IBS pain and altered bowel habits. Onion tolerance is dose-dependent — Monash-style portions help you keep flavor without crossing your symptom line. Stack fewer triggers in the same meal when symptoms are active.
- Bloating, gas, or urgency within hours Cramping that tracks with high-FODMAP meals Loose stools or constipation cycles after triggers
- Start from a low-FODMAP baseline, then reintroduce in measured portions to find your limit. For individualized guidance, speak with a qualified clinician. Sensio is for education and self-tracking, not diagnosis.
Educational information only — not medical advice. If you have food allergies, celiac disease, or an eating disorder, work with a qualified clinician before changing your diet.