Why Wegovy and Mounjaro Can Cause Sulphur Burps
Wegovy works by activating GLP-1 receptors, which — among other effects — slows the rate at which the stomach empties. This delayed gastric emptying means food spends longer in the digestive tract, giving bacteria more time to break it down and produce sulphur-containing gases. The result is that characteristic rotten-egg smell in burps, and sometimes flatulence too.
The same mechanism is at play with sulphur burps on Mounjaro, since tirzepatide also acts on the GLP-1 pathway (as well as GIP receptors). So while the medicines are different, the underlying reason for this particular side effect is similar.
When are sulphur burps most common?
- In the first few days after starting or increasing your dose
- After eating foods high in sulphur — such as eggs, red meat, garlic, onions, broccoli, cauliflower, and cabbage
- When overall digestion is slowed and food sits in the stomach longer than usual
Does it get better?
Many people report that the intensity of sulphur burps eases as their body adjusts to the medicine — particularly once they move past a new dose stage. Keeping a note of when they happen and what you have eaten can help you spot your own personal triggers. For more detail on the digestive side-effect picture with tirzepatide specifically, see the full overview of sulphur burps on Mounjaro.
According to NHS guidance, gastrointestinal side effects including nausea, burping, and digestive discomfort are among the most commonly reported effects of GLP-1 medicines, and they are typically most pronounced early in treatment.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
Tracking the right four numbers — weight, waist, protein and dose — turns a noisy chart into a clear story. That's the loop GLP-1 users keep coming back for.
AI Meal Tracking. Built for GLP 1 Appetites.
Point your camera at any meal and let our AI do the rest. Breakfast, doses, weight, mood all tracked in seconds.
Tracking Sulphur Burps with GLP Trackr
One of the most useful things you can do when a side effect like this crops up is to log it consistently — noting when it happens, how severe it feels, and what you had eaten beforehand. Over time, that record can reveal patterns that are genuinely hard to spot in the moment.
GLP Trackr's side-effect tracker lets you log symptoms like burping and digestive discomfort each day, rating severity so you can see at a glance how your experience changes across your treatment. Pair that with the food logging feature — where you can search, scan a barcode, or use the AI photo scan on your meal — and you may start to see which foods are reliably triggering the worst episodes. That kind of joined-up record is also useful to bring to your next appointment: the doctor report feature lets you share a clear summary of your journey with your prescriber, so the conversation is based on your actual data rather than trying to recall weeks of symptoms from memory.
If you want to understand the broader side-effect picture for Mounjaro users, the Mounjaro side effects hub covers the full range of commonly reported effects and how to track them. You can also read more about managing sulphur burps specifically on Mounjaro if you or someone you know is on tirzepatide.
A note on safety: Sulphur burps are unpleasant but generally considered a benign digestive nuisance. However, if you are experiencing severe or persistent vomiting, significant abdominal pain, or anything that feels serious or unusual, contact your healthcare professional promptly — GLP Trackr helps you record what you're experiencing to support that conversation, but it is not a substitute for clinical advice. Any concerns about your dose or whether to continue treatment should be discussed with your prescriber or doctor, who knows your full history.
Side effects can also be reported to your national reporting scheme — for example, the UK's Yellow Card scheme — as well as to your healthcare professional.
Ready to start logging your symptoms and spotting your own patterns? Download GLP Trackr on the App Store or Google Play and explore everything free for your first 7 days.
What does glptrackr include?
10+ powerful features. One app. Built specifically for Mounjaro and Wegovy users.
Everything your GLP-1 journey needs. Free to try for 7 days.
Morning Check-In
Start every day with a 60-second wellness check-in. Log how you're feeling, track nausea, appetite, energy, and mood — giving you and your care team a complete picture of how your medication is working.
Injection Tracking
Log every dose with a single tap. Track your dose history, phase in your cycle, estimated medication levels, and upcoming injection dates — with reminders so you never miss a scheduled shot.
Hydration Reminders
Staying hydrated is especially important on GLP-1 medications. Set daily water targets, log intake throughout the day, and receive smart nudges when you're falling behind your goal.
Smart Meal Planning
Personalized meal plans built around your current dose phase and side effects. Every meal is GLP-1 optimized — high in protein, gentle on the stomach, and scaled to your reduced appetite.
Recipe Library
Browse 50+ high-protein, GLP-1-friendly recipes filtered by meal type, prep time, and dietary needs. Every recipe includes full nutrition info, step-by-step instructions, and tips for eating with side effects.
Progress Analytics
Beautiful, easy-to-read charts show your weight loss trajectory, weekly nutrition trends, medication responses, and wellbeing scores over time — turning raw data into genuine insights.
AI Meal Scanning
Snap a photo of any meal and get a full nutrition breakdown in seconds — calories, protein, carbs, fat, and fibre. No searching. No manual logging. Just point, snap, and track.
Exercise & Steps
Log walks, workouts, and movement with activity targets that flex with your energy levels. On lower-energy dose days, gentler targets keep you moving without burning out.
Community Support
Connect with thousands of others navigating the same medication journey. Share milestones, ask questions, find accountability partners, and get support from people who truly understand.
Never Forget a Dose Again.
Log your Mounjaro or Wegovy injection in seconds. Track your pen, your dose level, and your injection site — so you always know exactly where you are in your treatment.
Watch Your Body Transform, Week by Week.
Log your weight, measurements, and how you're feeling after each dose. GLPTrackr turns your data into clear, motivating charts that show you how far you've really come.
You're Not on This Journey Alone.
Connect with thousands of real GLP-1 users sharing their wins, side effect tips, and meal ideas. Get the support of people who truly get it — because they're living it too.
Download on the App Store Download on the Google Play
Founding Member Offer
One plan. Everything included. No hidden extras.
Founding Member
Exclusive Offer
Join the first 1,000 membersand lock in our lowest ever price
Offer expires in:
786 of 1000 founding spots remaining
50% OFF
Lifetime Price Lock
Never pay full price • Forever
🔒 No credit card required • Cancel anytime
Premium
Ad-free- Track weight, meals, water, exercise, & sleep
- Log doses, injection sites, & side effects
- 60-second daily morning check-in
- AI meal scanning & barcode scanning
- Personalised AI meal plans & recipes
- Golden Dose Finder AI
- Medication Clock — real-time level tracking
- Daily Brief and predictive side effects
- Full insights & weekly transformation cards
- Unlimited progress photos
- Doctor PDF export & body measurements
- Community Access—Connect with GLP-1 users
Powered by
🔒 No credit card required • Cancel anytime
The Most Advanced GLP-1 Brain Ever Built.
The first AI built exclusively for GLP-1 weight loss. Every insight, every meal plan, every prediction trained on one thing only: helping you get the most out of your medication.
Knows Your Cycle
GLPIQ tracks where you are in your injection cycle and adjusts everything around it: lighter meals on nausea days, higher protein when appetite returns, and smarter targets as your medication level shifts.
Predicts Before You Feel It
GLPIQ learns your personal side effect patterns over time. After a few cycles, it starts warning you the morning before a rough day — and adjusts your meal plan automatically.
Finds Your Golden Dose
GLPIQ analyses every dose you've been on: weight loss rate, side effects, food noise, mood, protein adherence and tells you which dose gave you the best results. No other app does this.
Download glptrackr today.
Available on iOS and Android. 7-day free trial, no credit card needed.
Frequently asked questions.
Wegovy slows stomach emptying as part of how it works, giving gut bacteria more time to produce sulphur gases from food. This delayed digestion is the main reason for the egg-like smell. The effect is most noticeable after dose increases and often eases as the body adjusts.
Many people find sulphur burps ease after the first few weeks on a new dose as the body adapts. Reducing high-sulphur foods such as eggs, garlic, onions, and cruciferous vegetables may also help. If they persist or feel severe, discuss this with your prescriber or doctor.
Yes — sulphur burps are also commonly reported with Mounjaro (tirzepatide), because tirzepatide similarly slows gastric emptying via the GLP-1 pathway. The experience and triggers are broadly similar to those reported on Wegovy.
Mild burping and digestive discomfort are common and typically not serious. If you experience severe or persistent abdominal pain, vomiting, or any symptoms that worry you, contact your healthcare professional promptly rather than waiting.
Logging symptoms and meals together helps reveal patterns — for example, which foods make sulphur burps worse. GLP Trackr lets you record side-effect severity alongside your food intake each day, building a picture you can discuss with your prescriber at your next appointment.