What Are GLP-1s and How Do They Work?
GLP-1 (glucagon-like peptide-1) is a hormone naturally produced in the gut after eating. It plays a role in signalling fullness, regulating insulin release, and slowing the rate at which the stomach empties. Medicines known as GLP-1 receptor agonists mimic or enhance this hormone by binding to GLP-1 receptors found in the brain, gut, and pancreas.
The result, as commonly reported by people taking these medicines, is a reduced sense of hunger and a greater feeling of fullness after eating — sometimes described as a quietening of "food noise". Slower gastric emptying is also a well-documented effect, though it often becomes less pronounced over time.
GLP-1 Receptors: Why They Matter
GLP-1 receptors are found throughout the body, which is why GLP-1 medicines can have effects beyond appetite alone — including on blood sugar regulation, digestion, and even cardiovascular pathways. The specific effects depend on the individual and the medicine prescribed. For a detailed look at how this receptor system works, NHS guidance on semaglutide offers a helpful starting point.
Which Brands Are GLP-1 Medicines?
Several prescription medicines belong to this class. Two of the most widely prescribed for weight management are:
- Wegovy (semaglutide) — a GLP-1 receptor agonist given as a once-weekly injection
- Mounjaro (tirzepatide) — a dual GIP and GLP-1 receptor agonist, also given once weekly; you can read more on the Mounjaro overview page
There are also GLP-1 medicines used primarily in type 2 diabetes management. Which medicine is appropriate for any individual is always a decision made by a prescriber — not something to be self-selected. For a broader look at this medicine class, see our page on GLP-1 medicines and what to expect.
These are all prescription-only medicines. Suitability, dosing, and monitoring are decisions that belong with your prescriber or doctor.
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 GLP-1 Journey with GLP Trackr
Once you are prescribed a GLP-1 medicine, staying consistent and understanding your own patterns matters — and that is exactly where GLP Trackr helps. The app's side-effect tracker lets you log how you feel day to day (nausea, fatigue, digestion changes) and build a record you can bring to your next prescriber appointment rather than trying to recall it from memory.
Alongside that, the daily check-in captures energy levels, mood, sleep, and food noise in about 30 seconds — so you start to see how those factors shift as your body adjusts to the medicine over time. The insights and analytics features then surface patterns from your own data, giving you a clearer picture of what is actually happening across your journey.
GLP Trackr is available free to download on the App Store and Google Play, with a 7-day free trial — so you can start building your personal record from day one. It is not a substitute for your prescriber's guidance; it is the companion that helps you show up to those conversations better prepared.
If you ever experience symptoms that feel severe, persistent, or unusual, contact your healthcare professional promptly — the app helps you record what you notice, but clinical decisions always belong with the people who know your full medical history.
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.
GLP-1s (glucagon-like peptide-1 receptor agonists) are a class of prescription medicines that mimic a natural gut hormone. They act on receptors in the brain and digestive system to reduce appetite and promote feelings of fullness. They are prescription-only; suitability is decided by a prescriber.
GLP-1 receptors are proteins found in the brain, gut, and pancreas that respond to the hormone GLP-1. Medicines in this class bind to these receptors to influence appetite, feelings of fullness, and blood sugar regulation. The specific effects vary between individuals.
Wegovy (semaglutide) and Mounjaro (tirzepatide) are two commonly prescribed GLP-1-based medicines for weight management. Mounjaro also targets GIP receptors. Other GLP-1 medicines exist for type 2 diabetes. Which is appropriate for you is a decision for your prescriber or doctor.
GLP-1 is the natural hormone produced in the gut. A GLP-1 agonist is a medicine that mimics or activates GLP-1 receptors. The two terms are often used interchangeably in everyday conversation, but technically the agonist refers to the prescribed medicine rather than the hormone itself.
Yes. GLP Trackr is a companion app built for people already prescribed GLP-1 medicines like Mounjaro or Wegovy. It lets you log side effects, daily wellbeing, weight, and food, and provides insights from your own data to support conversations with your prescriber.