Why does Ozempic or Mounjaro cause sulfur burps?

GLP-1 medications slow how fast your stomach empties. Food sits longer and ferments, and protein-rich, sulfur-containing foods can produce hydrogen sulfide gas, which gives the burps their rotten-egg smell. It's uncomfortable but generally harmless and tends to ease as your body adjusts.

What foods trigger sulfur burps?

The usual triggers are very high-fat or fried meals, large portions, and big servings of sulfur-rich foods eaten all at once: eggs, red meat, garlic, onions, and cruciferous vegetables like broccoli and cabbage. Carbonated drinks and eating quickly make it worse.

How do I get rid of sulfur burps fast?

Eat smaller, lower-fat meals; slow down; sip water; and take a walk after eating to help your stomach empty. If they are severe, persistent, or come with vomiting or pain, contact your healthcare provider so they can review your dose.

Sulfur Burps on GLP-1: Why They Happen and What to Eat

Published 12 June 2026Evidence-based · 3 sources

Reviewed by Bogdan Marcu, Licensed Nutritionist & Dietitian

The rotten-egg-smelling burps that show up on GLP-1 medications like Mounjaro and Ozempic are a common complaint. They are unpleasant but usually harmless, and a few small eating changes make a real difference.

Why GLP-1 medications cause sulfur burps

GLP-1 medications slow how quickly your stomach empties. When food lingers longer, it has more time to ferment. Sulfur-containing foods (especially protein-rich ones) can then produce small amounts of hydrogen sulfide gas, which is what gives the burps their distinctive smell. The same delayed emptying that curbs your appetite is the root cause, so it is most common early on and after a dose increase.

What to eat (and avoid)

Smaller, more frequent meals. Large portions overwhelm an already-slow stomach. Eating less at once is the single most effective change.
Go easy on fat. Very fatty and fried meals slow emptying further. Choose leaner high-protein foods and lighter cooking methods.
Spread out sulfur-rich foods. You do not need to cut eggs, red meat, garlic, onions, or broccoli; just avoid large servings of them in a single meal.
Slow down and sit up. Eating quickly swallows air; staying upright and walking gently after meals helps your stomach empty.
Limit carbonated drinks, which add to the gas.

For meal ideas that are protein-forward but gentle, see our recipes and the guide to foods to avoid on GLP-1.

When to see a doctor

Sulfur burps on their own are not dangerous. But if they are severe, last more than a few days, or come with persistent vomiting, diarrhea, or stomach pain, contact your healthcare provider. They can check your dose and rule out other causes. As always, this is general nutrition information rather than medical advice.

Frequently asked questions

Why does Ozempic or Mounjaro cause sulfur burps?: GLP-1 medications slow how fast your stomach empties. Food sits longer and ferments, and protein-rich, sulfur-containing foods can produce hydrogen sulfide gas, which gives the burps their rotten-egg smell. It's uncomfortable but generally harmless and tends to ease as your body adjusts.
What foods trigger sulfur burps?: The usual triggers are very high-fat or fried meals, large portions, and big servings of sulfur-rich foods eaten all at once: eggs, red meat, garlic, onions, and cruciferous vegetables like broccoli and cabbage. Carbonated drinks and eating quickly make it worse.
How do I get rid of sulfur burps fast?: Eat smaller, lower-fat meals; slow down; sip water; and take a walk after eating to help your stomach empty. If they are severe, persistent, or come with vomiting or pain, contact your healthcare provider so they can review your dose.