Belly Fat and Weight Loss Diet: What to Eat on Mounjaro or Wegovy

Fat loss — including around the abdomen — happens when you consistently consume fewer calories than your body burns. On a GLP-1 medicine like tirzepatide (Mounjaro) or semaglutide (Wegovy), reduced appetite and lower 'food noise' often make achieving that deficit more manageable. The key is making sure the calories you do eat are working hard for you.

Prioritise protein at every meal

Protein is arguably the most important nutrient in a belly fat weight loss diet plan. It helps preserve lean muscle mass as you lose weight, keeps you fuller for longer, and has a higher thermic effect — meaning your body burns more energy digesting it. Aim to include a protein source at every meal: eggs, chicken, fish, tofu, Greek yoghurt, cottage cheese, and legumes all work well. If you want a starting point for how much protein to target daily, our guide on what to eat for weight loss covers practical ranges in more detail.

Fill half your plate with vegetables and fibre

Non-starchy vegetables — leafy greens, courgette, broccoli, peppers, cucumber — add volume and fibre without adding many calories. Fibre slows digestion, supports gut health, and helps you feel satisfied even when eating smaller portions. Wholegrains like oats, brown rice, and lentils are good fibre sources that also provide sustained energy.

Limit ultra-processed foods and liquid calories

Ultra-processed foods tend to be calorie-dense and low in protein and fibre — the opposite of what supports fat loss. Sugary drinks, including fruit juices and many smoothies, can add a significant number of calories without triggering fullness. If you enjoy smoothies, a belly fat weight loss smoothie built around a protein source (Greek yoghurt, protein powder), a handful of leafy greens, and low-sugar fruit like berries is a far more diet-friendly option than a commercial blended drink.

Watch portion sizes without obsessing

GLP-1 medicines often naturally reduce portion sizes, but it is still worth being mindful of calorie-dense foods like nuts, oils, cheese, and avocado — all nutritious, but easy to overeat. Understanding your daily calorie needs helps you see the full picture; our calorie deficit guide explains how this works in practice. You can also explore how calories and dietary fat interact to understand why fat intake matters beyond just total calories.

A structured weight loss diet plan can help you put these principles together into a daily routine that feels sustainable rather than restrictive.

Knowing what to eat is one thing — consistently tracking it is where most people find things slip. GLP Trackr's AI food photo scanner makes logging effortless: point your camera at a meal and get an instant breakdown of calories, protein, and macros without manually entering every ingredient. On days when appetite is low and meals are small, that speed matters.

Beyond food scanning, you can set daily protein and calorie targets that reflect your goals, and the morning check-in lets you log weight, energy, and how your hunger levels feel — so you can see over time how your diet choices connect to your progress. The meal plans inside the app are built specifically around GLP-1-friendly eating: protein-first, gentle on the stomach, and designed for smaller appetites.

All of this data sits in one place, making it straightforward to spot patterns — for example, whether higher protein days correlate with better energy or steadier weight movement — and to bring a clear picture of your journey to your next prescriber appointment.

GLP Trackr is free to try for 7 days. Download it on the App Store or Google Play and start building a food-tracking habit that actually fits your GLP-1 life.

GLP Trackr provides general information and tracking tools — it is not a substitute for advice from your prescriber or doctor. If you have questions about your diet, weight-loss targets, or how your medicine is working for you, your healthcare professional is the right person to ask.