What Are Weight Loss Jabs and How Are They Taken?
Wegovy and Mounjaro are both prescription-only, once-weekly injectable medicines used alongside diet and lifestyle changes for weight management. They come as pre-filled pens and are self-administered by the person prescribed them — typically into one of three sites: the abdomen, the front of the thigh, or the upper arm.
How the injection sites work
Each of those three areas has a reasonable amount of subcutaneous (under-skin) fat tissue, making them suitable for the type of injection these medicines require. Rotating between sites — rather than injecting into exactly the same spot each time — is generally recommended to help the skin and tissue stay healthy. Your prescriber or doctor, and the patient information leaflet that comes with your pen, are the right sources for the specific guidance that applies to you.
Why rotation matters
Using the same injection site repeatedly can cause changes to the skin and tissue over time, which may affect how the medicine is absorbed. Keeping a simple record of where you last injected makes rotation straightforward rather than something you have to try to remember.
The broader conversation
These medicines have attracted significant public and policy attention — discussions in the media, questions about access, and debates about who they are appropriate for. If you are already prescribed one, the practical focus is making the most of the treatment your clinician has put in place. For a closer look at one of the most commonly prescribed options, see Mounjaro as a weight loss jab. You can also explore the pros and cons of weight loss jabs for a balanced overview, or read about whether weight loss jabs are considered safe — including what the evidence says and when to seek advice.
If you have questions about access or cost, our page on weight loss jab pricing addresses that topic, and weight loss jabs at pharmacies covers how these medicines are typically dispensed in different settings.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
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How GLP Trackr Helps You Track Your Injections
Keeping on top of a weekly injection schedule — including which site you used last time — is easier when it is logged somewhere rather than left to memory. GLP Trackr's injection-site tracking feature lets you record each jab: the date, the dose strength, and the body area used. The app then keeps a rotation history and can suggest where to inject next, so you are not guessing.
Beyond site rotation, the app also sends gentle dose reminders so your weekly schedule stays consistent. And because side effects can come and go — particularly in the earlier weeks — the side-effect log lets you note how you felt after each injection, building a picture you can bring to your next prescriber appointment rather than trying to recall it from memory.
GLP Trackr is available free on the App Store and Google Play, with a 7-day free trial so you can see whether it fits into your routine. Log your first injection today and let the app handle the rotation tracking from there.
If you want to understand more about how these medicines work or what concerns have been raised in public debate, our page on new concerns around weight loss jabs covers that, and you can read about weight loss jabs and cancer research for factual context on that topic. For a broader guide to injectable weight management medicines, visit the weight loss injections hub.
Always follow the guidance your prescriber or doctor has given you about injection technique, site care, and your overall treatment plan — they know your full medical history. If you notice anything at an injection site that concerns you, or experience symptoms that feel severe or persistent, contact your healthcare professional promptly. Any side effects worth reporting can also be submitted to your national pharmacovigilance scheme (such as the UK's Yellow Card scheme) as well as raised with your prescriber.
What does glptrackr include?
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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.
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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.
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Frequently asked questions.
Weight loss jabs is the informal term for once-weekly injectable prescription medicines such as Wegovy (semaglutide) and Mounjaro (tirzepatide), used alongside diet and lifestyle changes for weight management. They are prescription-only medicines, meaning a clinician must prescribe them.
These medicines are typically injected into subcutaneous tissue at one of three sites: the abdomen, the front of the thigh, or the upper arm. Your prescriber or doctor and the leaflet included with your pen provide the specific guidance relevant to your prescription.
Rotating between sites is generally recommended to avoid repeated trauma to the same area of skin and tissue, which can affect how the medicine absorbs. Your prescriber or the patient information leaflet for your specific pen will give you the appropriate rotation guidance.
These are prescription-only medicines with established side-effect profiles. Whether they are appropriate and safe for a specific individual is a decision for their prescriber or doctor, based on their full medical history. For a factual overview, see our page on whether weight loss jabs are considered safe.
GLP Trackr lets you log each injection — date, dose strength, and body site used — and tracks your rotation history so the app can suggest where to inject next. It also sends weekly dose reminders and lets you log side effects after each injection to discuss with your prescriber.