Mounjaro and Wegovy: What the Evidence Says
Both Mounjaro and Wegovy belong to a class of medicines that act on appetite-regulating pathways in the body. Wegovy contains semaglutide, a GLP-1 receptor agonist. Mounjaro contains tirzepatide, which acts on both GLP-1 and GIP receptors — a dual mechanism not found in older injectable options.
These medicines are typically started at a low dose, with the prescriber adjusting the schedule over time based on how well you tolerate each stage. Neither is a quick fix or suitable for everyone; your prescriber will have assessed your suitability before prescribing.
What makes an injection "safe"?
Safety in this context means the medicine has been through rigorous clinical review and is used under medical supervision. Both Mounjaro and Wegovy carry a black triangle (▼) designation in the UK, meaning they are subject to additional monitoring. Any side effects should be reported to your healthcare professional and, where applicable, to your national reporting scheme (such as the UK's Yellow Card scheme).
Commonly reported side effects include nausea, constipation, diarrhoea, and fatigue — particularly in the early weeks or after a dose increase. These are generally described as temporary, but if anything feels severe or persistent, contact your healthcare professional promptly.
For a broader look at how these injections compare, see our guide to weight loss injections, or explore what makes a weight loss injection safe and how to discuss safety with your prescriber. You can also find more detail in our complete weight loss injections hub.
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 Your Injection Journey with GLP Trackr
Whichever medicine you have been prescribed, staying consistent with your weekly injection schedule is one of the most important things you can do. GLP Trackr is built specifically for this.
The app's injection-site tracking and rotation feature lets you log each injection — recording the site (abdomen, thigh, or upper arm), the date, and the dose strength — and then suggests where to inject next time. Rotating sites regularly is widely recommended to support skin and tissue health, and the app makes it automatic rather than something to keep in your head.
Alongside site tracking, dose reminders mean your weekly schedule stays on track without relying on memory alone. And if you ever have a concern to raise at your next appointment, the app's doctor report gives your prescriber a clear summary of your injection history, side effects, and progress in one place.
GLP Trackr does not give medical advice, and any questions about your dose or how you are tolerating your medicine should always go to your prescriber or doctor — they know your full picture. The app is there to help you stay organised, consistent, and informed throughout your journey.
Ready to keep your injection routine on track? Download GLP Trackr on the App Store or Google Play and try it free for 7 days — no commitment needed.
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.
Mounjaro (tirzepatide) and Wegovy (semaglutide) are the most widely prescribed weight loss injections with established safety reviews. Neither is universally best — your prescriber or doctor will assess which, if either, is appropriate for your individual circumstances.
Both are prescription-only medicines that have undergone regulatory review and are used under medical supervision. They carry additional monitoring status. Side effects are commonly reported, especially early on. Speak with your healthcare professional if anything feels severe, persistent, or worrying.
Wegovy contains semaglutide and acts on GLP-1 receptors. Mounjaro contains tirzepatide and acts on both GLP-1 and GIP receptors. Both are once-weekly injections prescribed for weight management. Which is right for you is a decision for your prescriber, not something to determine independently.
GLP Trackr lets you log each injection, track which site you used, and get a suggested rotation for next time. Dose reminders help you stay on schedule, and a doctor report summarises your journey for prescriber appointments. It works with both Mounjaro and Wegovy.