How Many Calories Should You Eat Per Day on a GLP-1 Journey?

There is no single correct number that applies to everyone. General population guidance — including that published by health authorities in many countries — typically points to around 2,000 calories per day as a broad reference for adult women and around 2,500 for adult men. These are illustrative averages, not personal targets, and individual needs can sit meaningfully above or below these figures depending on your body composition and how active you are.

Why your needs may differ

• Body size and composition: larger bodies and those with more muscle mass generally require more energy.
• Activity level: daily movement, exercise, and even non-exercise activity (like walking or standing) all affect how much fuel your body needs.
• Age: energy requirements tend to shift gradually over time.
• Health goals: people working toward weight loss typically aim for a modest reduction below their maintenance level — often called a calorie deficit.

Calories on a GLP-1 medicine

Many people taking Mounjaro or Wegovy find their appetite is noticeably reduced, which can make it easier to eat less — but also easier to fall short of important nutrients, particularly protein. Eating too far below your needs for too long can affect energy levels, muscle mass, and overall wellbeing, so staying aware of your actual intake matters. You can read more about calorie guidance tailored to different situations in our pages on daily calorie intake for women and daily calorie intake for men.

Understanding your output side of the equation is just as useful — how much energy you are actually burning each day is covered in our guide on calculating calories burned.

Knowing the recommended amount of calories per day is one thing — knowing what you are actually eating day to day is another. GLP Trackr makes food logging as frictionless as possible, which matters when your appetite is low and sitting down to record every meal feels like the last thing you want to do.

The app's AI photo scan lets you point your camera at a plate and get an instant breakdown of calories, protein, and other macros — no searching, no typing. For packaged foods, the barcode scanner fills in the details automatically. You can also set a personal daily calorie target and track your progress toward it throughout the day, so you always know where you stand without mental arithmetic.

If you are trying to make sure your reduced intake is still nourishing — enough protein, enough fibre, enough overall energy — GLP Trackr's targets and daily check-in give you a clear picture at a glance. These numbers are yours to set and adjust; they are a tracking tool, not a medical prescription. For guidance on what your personal targets should be, always speak with your prescriber or doctor or a registered dietitian who knows your full picture.

For a broader look at managing your energy intake and output as part of your weight-loss journey, our hub on understanding a calorie deficit is a good next step.

Ready to see what you are actually eating each day? Download GLP Trackr on the App Store or Google Play and start a free 7-day trial — snap your meals, set your targets, and let the app do the counting.