What Shapes Your Daily Calorie Needs?
Calorie requirements are driven by two main components: your Basal Metabolic Rate (BMR) — the energy your body burns at rest just to keep organs and systems functioning — and your Total Daily Energy Expenditure (TDEE), which layers in everything you do on top of that, from walking to work to a structured workout.
Key factors that affect the number
- Sex and body composition: On average, adult males have more muscle mass than adult females, which burns more energy at rest — one reason general calorie estimates for men tend to be higher. That said, body composition matters more than sex alone.
- Age: Metabolic rate tends to decline gradually with age, so a 25-year-old and a 55-year-old with similar activity levels may have noticeably different needs.
- Activity level: A sedentary desk job requires far fewer calories than a physically demanding occupation or a consistent training programme.
- Health goals: Maintaining weight, losing weight, or building muscle each call for different calorie targets — and on a GLP-1 medication like Mounjaro or Wegovy, appetite changes often mean eating less without deliberately trying to restrict.
Why this matters on a GLP-1 journey
People taking Mounjaro (tirzepatide) or Wegovy (semaglutide) commonly report a significant reduction in hunger and "food noise." This can make it easy to eat well under your needs without realising it — which over time can affect energy levels and muscle maintenance. Keeping an eye on how many calories you are actually consuming helps you stay informed and have more productive conversations with your prescriber or doctor.
For a deeper look at personalising your daily intake, see our guide on how many calories a person should consume in a day, and for a broader exploration of calorie targets, visit our calorie calculator hub.
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.
Track Your Calorie Intake Automatically with GLP Trackr
Manually counting calories can feel burdensome at the best of times — and on a GLP-1 journey, where meals are often smaller and appetite unpredictable, it can be easy to either over-log or give up entirely. GLP Trackr's AI photo scan is designed to remove that friction: point your camera at your plate and the app estimates your calories, protein, and key macros in seconds, without typing a thing.
Once your food is logged, GLP Trackr lets you set a personal calorie target and tracks your daily intake against it. You can see at a glance whether you are hitting a reasonable range or consistently falling short — useful context to bring to your next appointment. The app also tracks protein separately, which matters on a GLP-1 because preserving muscle while losing weight relies on eating enough protein even when overall appetite is low.
If you are still working out what daily calorie range makes sense for you, the pages on how many calories you should eat and how many calories to eat each day cover the calculation in more detail. Any specific calorie or nutrition target should be agreed with your prescriber or doctor — they can factor in your full health picture in a way a general guide cannot.
GLP Trackr is free to try for 7 days on iOS and Android. Download it on the App Store or Google Play and see how effortless food tracking can be when your camera does the work.
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.
General guidance places most adult males in the 2,000–2,500 kcal per day range for weight maintenance, but this varies widely with age, activity level, body size, and health goals. On a GLP-1 medication, appetite changes often mean eating less — tracking your actual intake helps you stay informed.
A commonly referenced maintenance range for adult females is roughly 1,600–2,000 kcal per day. Individual needs differ based on activity, age, and body composition. Anyone on Mounjaro or Wegovy should discuss their specific calorie needs with their prescriber or doctor.
BMR (Basal Metabolic Rate) is the calories your body burns at complete rest to sustain basic functions. TDEE (Total Daily Energy Expenditure) adds all your daily movement on top. Your TDEE is the more practical figure for setting a daily calorie target.
The medicines do not change your calorie requirements directly, but the reduced appetite many people experience means actual intake often drops. Logging what you eat helps ensure you are still meeting protein and energy needs — something worth discussing with your prescriber or doctor.
GLP Trackr lets you log food by scanning a photo with the AI food scanner, using barcode scan, or searching manually. It tracks daily calories and protein against a target you set, giving you a clear picture of your intake to review and discuss with your healthcare team.