How private weight loss injections work
Mounjaro and Wegovy are both prescription-only, once-weekly injectable medicines supplied as pre-filled pens. Mounjaro contains tirzepatide, which acts on GIP and GLP-1 receptors, while Wegovy contains semaglutide, a GLP-1 receptor agonist. Both are typically started at a lower dose, with adjustments made over time by your prescriber — not something to decide independently.
Common injection sites
These medicines are generally injected into subcutaneous (fatty) tissue. The three sites most commonly used are the abdomen, the front of the thigh, and the upper arm. Your prescriber or the patient information leaflet that came with your pen will guide you on the specifics of technique — that guidance is worth following closely.
Why injection-site rotation matters
Injecting into the same spot repeatedly can cause changes to the tissue beneath the skin, which may affect how the medicine is absorbed. Rotating between sites and between different positions within the same site is widely recommended. Keeping a record of where you last injected makes rotation straightforward rather than something you have to try to remember.
If you are new to injectable medicines or have any uncertainty about how to administer your pen, speak with your prescriber or a healthcare professional before your next dose. For a broader overview, see our guide to weight loss injections.
People exploring options in this area also often find it helpful to read about weight loss jabs generally and how Mounjaro specifically is used — covered in our page on weight loss jabs with Mounjaro.
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.
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Tracking your private injections with GLP Trackr
Staying consistent with a weekly injection schedule is easier when every dose is recorded in one place. GLP Trackr's injection-site tracking feature lets you log each site you use and automatically suggests where to inject next, so rotation happens without guesswork. You can also record the dose strength and date of each injection, giving you a clear history to refer back to or share with your prescriber.
Alongside site tracking, dose reminders mean a weekly injection is much less likely to slip your mind — useful during busy weeks or when you are travelling. If you ever miss a dose, log it in the app so you have an accurate record to discuss with your prescriber; any decision about timing belongs with them, not an app or a forum.
For a fuller picture of what private weight loss injections involve, our overview of private weight loss injections covers more of the practical detail.
If anything about your injection causes concern — pain, swelling, a reaction at the site, or anything that feels wrong — contact your healthcare professional promptly. GLP Trackr helps you record what you are experiencing so that conversation is easier, but it is not a substitute for clinical advice.
Ready to bring some structure to your weekly injection routine? Download GLP Trackr on the App Store or Google Play and try it free for 7 days — your injection history, site rotation, and dose log all in one place.
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.
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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.
Download glptrackr today.
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Frequently asked questions.
Mounjaro and Wegovy are injected into subcutaneous tissue, typically at the abdomen, front of the thigh, or upper arm. Your prescriber or the patient information leaflet supplied with your pen will provide guidance specific to your medicine.
Yes — rotating between sites and positions within a site is widely recommended. Injecting repeatedly into the same spot can affect tissue and medicine absorption. Keeping a log of each site used makes rotation easy to follow consistently.
The medicine itself is the same whether prescribed privately or through another route. The difference lies in how the prescription is obtained and managed. Always follow the guidance of the prescriber who issued your prescription.
Any decision about a missed dose belongs with your prescriber or doctor — do not double up or adjust timing without their guidance. Log the missed dose in GLP Trackr so you have an accurate record to discuss at your next appointment.
Yes. GLP Trackr lets you log each injection site, dose strength, and date. The app tracks your rotation history and suggests your next site, and dose reminders help you stay on your weekly schedule.