Mounjaro and Wegovy: What the Evidence Shows
The two prescription weight loss injections most widely discussed today are Mounjaro (tirzepatide) and Wegovy (semaglutide). Both are once-weekly injectable medicines prescribed alongside a reduced-calorie diet and increased physical activity. Neither is available without a prescription, and suitability is assessed on a case-by-case basis by a healthcare professional.
How they work
Wegovy contains semaglutide, a GLP-1 receptor agonist that acts on appetite-regulating pathways in the brain, increasing feelings of fullness and reducing food intake. Mounjaro contains tirzepatide, a dual GIP and GLP-1 receptor agonist — meaning it activates two separate hormonal pathways involved in appetite and blood sugar regulation. Both medicines slow gastric emptying, which is one reason many people report a reduction in hunger and food noise.
Results vary — and that is normal
Clinical trials have reported meaningful average weight reductions for both medicines, but individual outcomes differ considerably. How much weight a person loses depends on factors including starting weight, diet, activity levels, adherence, how the dose is managed over time, and how their body responds. There is no single injection that delivers the best results for everyone — which is why prescriber-led decision-making matters so much.
If you are researching costs or access, our pages on weight loss injection pricing factors and finding well-priced weight loss injections may be useful context — though neither we nor GLP Trackr supply or source medication. For a broader overview of injectable weight loss medicines, see our guide to weight loss injections.
According to information published on the electronic Medicines Compendium, both tirzepatide and semaglutide are prescription-only and require ongoing clinical supervision throughout 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.
How GLP Trackr Helps You Get the Most From Your Injection
Whichever injection you have been prescribed, the biggest factor within your control is consistency — turning up each week, logging your dose, and understanding how your body is responding over time. That is exactly what GLP Trackr is built to support.
Injection-site rotation
Rotating your injection site each week helps maintain skin health and may support more consistent absorption. GLP Trackr lets you log each injection — date, dose strength, and site (abdomen, thigh, or upper arm) — and then suggests where to inject next based on your rotation history. It takes the mental load out of remembering where you last injected.
Dose logging and reminders
Missing a weekly dose can disrupt your progress. GLP Trackr's dose reminders mean you never lose track of your schedule, and every injection is recorded so you have a clear, dated history to refer to — or share with your prescriber at your next appointment.
Tracking your full response
The app also lets you log side effects, mood, energy, sleep, and weight alongside your dose history. Over time, these data points build into a picture of how your body is responding — insight that is genuinely useful to bring to a prescriber conversation.
Any concerns about your dose, side effects, or whether your current injection is right for you should always be discussed with your healthcare professional. GLP Trackr records your journey; it does not replace clinical guidance.
Ready to stay consistent and see your progress clearly? Download GLP Trackr on the App Store or Google Play — your first seven days are completely free.
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.
Both Mounjaro (tirzepatide) and Wegovy (semaglutide) have shown meaningful results in clinical trials, but individual outcomes vary widely. The right injection for any one person depends on their health history and circumstances — a decision that belongs with their prescriber or doctor.
Mounjaro contains tirzepatide, a dual GIP and GLP-1 receptor agonist. Wegovy contains semaglutide, a GLP-1 receptor agonist. Both are once-weekly prescription injections. Which is appropriate for an individual is determined by their prescriber based on personal health factors.
Yes — rotating between sites such as the abdomen, thigh, and upper arm each week is generally recommended. This supports skin health and may help with consistent absorption. Your prescriber or the patient information leaflet with your pen can advise on the correct technique for you.
No — GLP Trackr is a tracking app, not a medical service. It cannot recommend or compare medicines for any individual. That decision should be made with your prescriber. The app helps you track whichever injection you have already been prescribed, logging doses, sites, and your overall progress.
GLP Trackr lets you log each injection (date, dose strength, and site), tracks your rotation history and suggests your next site, sends dose reminders, and records side effects and weight over time — giving you a clear picture of your journey to discuss with your healthcare professional.