Why do I have sulfur burps (rotten-egg burps) on a GLP-1?
The short answer: Those rotten-egg burps come from food sitting longer in a slowed-down gut — unpleasant, usually harmless, and manageable. This is a common and much-discussed GLP-1 complaint.
Why it happens
Because your stomach empties more slowly on a GLP-1, food (especially protein and fatty meals) lingers and ferments longer. That fermentation produces hydrogen sulfide gas — the same compound that makes rotten eggs smell — which comes back up as sulfur burps.
It often clusters after larger or richer meals and after dose increases, when digestion is slowest.
How long it lasts
It tends to come and go with meals rather than being constant, and usually eases as your body adjusts to a dose. Larger, fattier meals reliably make it worse.
What helps
- Eat smaller portions and avoid very fatty or heavy meals
- Slow down — don't gulp air with food or drink
- Stay hydrated and keep moving after meals to help digestion
- Some people find fewer sulfur-rich foods (eggs, red meat, garlic, onions) helps
When to call your doctor
- Sulfur burps with persistent vomiting or severe abdominal pain
- Signs your gut has stopped moving — bloating with no bowel movement and vomiting
Track this against your dose. Logging sulfur burps week by week shows whether it's actually easing — and gives your prescriber real data.
Related symptoms
Educational information from Calqulate.net — not medical advice, diagnosis, or treatment. Follow your prescriber's instructions and contact a licensed clinician about your symptoms.
