The Main Types of Weight Loss Injections
Injectable weight management medicines fall into a small number of pharmacological categories, each working through different pathways in the body.
GLP-1 Receptor Agonists
GLP-1 (glucagon-like peptide-1) receptor agonists are currently the most commonly prescribed injectable medicines for weight management. They act on appetite-regulating pathways in the brain and slow gastric emptying, which many people experience as reduced hunger and a quieter relationship with food. Semaglutide, available as Wegovy, is one well-known example in this class. For a deeper look at how individual options compare, see our guide to the different types of weight loss injections.
Dual GIP and GLP-1 Receptor Agonists
Tirzepatide (Mounjaro) works on two receptors — GIP (glucose-dependent insulinotropic polypeptide) as well as GLP-1. This dual action is what distinguishes it mechanically from single GLP-1 agents. Like other medicines in this space, it is prescription-only and typically started at a low dose, with any adjustments made by the prescriber over time.
Older Injectable Options
Earlier injectable medicines for weight management exist and are still prescribed in some settings, though they are less commonly discussed today. Your prescriber is best placed to explain what options are available and appropriate for you specifically — suitability varies considerably from person to person.
It is worth noting that weight loss injections are distinct from weight loss surgery, which is an entirely different category of intervention. The term "types of weight loss surgery" sometimes appears alongside injection searches, but surgical procedures and injectable medicines work through completely different mechanisms and decisions about either belong with a specialist.
All weight loss injections discussed here are prescription-only medicines. Obtaining them requires a valid prescription from a registered prescriber. For general information on how these medicines are accessed and what they typically involve, our overview of weight loss injections is a helpful starting point.
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 injectable medicine you have been prescribed, keeping an accurate record of every dose and injection site is one of the most practical things you can do to support your journey.
GLP Trackr's injection-site tracking and rotation feature lets you log where each shot was given — abdomen, thigh, or upper arm — and the app uses that history to suggest your next site automatically. Rotating injection sites is generally recommended to help avoid localised reactions, and having the app prompt you removes the guesswork from a weekly routine. Alongside site tracking, dose logging means every injection is timestamped with the strength and date, giving you a clear record to refer back to or share with your prescriber.
If you ever want to understand how your injections relate to how you feel day to day — energy levels, side effects, appetite — the side-effect and daily check-in features let you build a picture over time that is genuinely useful to bring to a prescriber appointment.
You can also explore our pages on the cost of weight loss injections and what affects injection costs for related context, though GLP Trackr itself does not supply or source any medication.
Always follow the guidance of your prescriber or doctor — they have your full medical history and are the right person to advise on which medicine, dose, and schedule is appropriate for you. If you experience any side effects that feel severe, persistent, or concerning, contact your healthcare professional promptly rather than adjusting your treatment on your own. Any adverse effects can also be reported to your national pharmacovigilance scheme (such as the UK's Yellow Card scheme) in addition to speaking with your prescriber.
Ready to bring some structure to your weekly injection routine? GLP Trackr is free to try for seven days — download it on the App Store or Google Play and let the site-rotation prompts take one thing off your mind.
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.
The most commonly prescribed types are GLP-1 receptor agonists (such as semaglutide/Wegovy) and dual GIP and GLP-1 receptor agonists (such as tirzepatide/Mounjaro). All are prescription-only medicines; a prescriber determines which, if any, is suitable for an individual.
GLP-1 receptor agonists act on one appetite-regulating pathway, while dual GIP/GLP-1 agonists like tirzepatide act on two. Both are injected once weekly and are prescription-only. The clinical difference between them for any individual is a matter for their prescriber to assess.
No. Weight loss injections are prescription medicines that work on appetite-regulating hormones. Weight loss surgery refers to surgical procedures such as gastric bypass or sleeve gastrectomy. They are entirely different interventions, and decisions about either belong with a qualified specialist.
Only a qualified prescriber or doctor can determine which injectable medicine, if any, is appropriate for you. Suitability depends on your medical history, other conditions, and individual circumstances. GLP Trackr is a tracking app and does not provide medical or prescribing advice.
Yes. GLP Trackr's injection-site logging and rotation feature works for both Mounjaro and Wegovy users. You log the site after each injection and the app suggests your next rotation site automatically, helping you maintain a consistent routine.