Egg Burps on Mounjaro: What Causes Them and What You Can Do

Egg burps — sometimes called sulphur burps — occur when hydrogen sulphide gas builds up in the digestive tract and is released through belching. On Mounjaro, the most likely explanation is the medicine's effect on gastric emptying. Tirzepatide acts on GLP-1 and GIP receptors, which slows the rate at which food leaves the stomach. When food sits in the stomach for longer than usual, it has more time to ferment, producing gases that can have a distinctly eggy smell.

This effect is also reported by people taking Wegovy (semaglutide) and other GLP-1 receptor agonists — so if you have come across references to egg burps on Mounjaro or read broader discussions of sulphur burps on Mounjaro, you are not alone, and the mechanism is well understood.

When are they most common?

Many people find egg burps are most noticeable in the first few days after starting a new dose or moving up a titration step. As the body adapts over the following weeks, the frequency often reduces. They can also be triggered or worsened by certain foods — high-protein foods, eggs themselves, cruciferous vegetables (broccoli, cauliflower, cabbage), and carbonated drinks are among those commonly reported to make things worse.

Are they a sign something is wrong?

For most people, egg burps are an uncomfortable but harmless side effect rather than a warning sign. However, if you are also experiencing severe or persistent nausea, vomiting, abdominal pain, or any symptom that feels unusual or worrying, you should contact your healthcare professional promptly. You can find a broader overview of gastrointestinal side effects in our guide to Mounjaro side effects, which covers what is commonly reported and when to seek advice.

Keeping a log of when egg burps occur — and what else was happening that day — is one of the most practical things you can do. Patterns often emerge: a particular food, a certain point in the weekly injection cycle, or a change in water intake can all be contributing factors that are easy to miss without a record.

GLP Trackr's side-effect tracker lets you log symptoms like burping and nausea each day, so you can see at a glance whether they cluster around your injection day, after specific meals, or at a particular dose stage. Over time, that data becomes genuinely useful — both for your own understanding and as something concrete to share at your next prescriber appointment. The app's food logging feature (including an AI photo scan) can also help you spot whether certain meals are making things worse, so you can experiment with swaps without having to guess from memory.

Alongside the side-effect log, you might also find it useful to read about burping more generally on Mounjaro, which covers related experiences and practical observations from people at different stages of their journey.

GLP Trackr helps you record what you are experiencing so you can discuss it with your prescriber — it is not a substitute for their clinical advice. If symptoms are severe, persistent, or concern you, reach out to your healthcare professional rather than waiting.

Ready to start spotting your own patterns? Download GLP Trackr on the App Store or Google Play and try it free for 7 days — your side-effect and food logs are waiting.