If you’re considering using GLP-1 medication like Mounjaro, what to eat is an important question. Mounjaro, Ozempic, Wegovy and Retatrutide reduce appetite, which is part of how they help people lose weight. And when you’re eating less, the quality of your food gets more important.
It’s not about following an “Ozempic diet” or having a strict list of foods to avoid. It’s about making sure you cover the nutritional basics when you’re eating less, so you can feel good and stay healthy.
Why eating well matters when appetite is lower
One of the biggest things people notice on GLP-1 medications is that they’re just not as hungry. This makes it easier to be in a calorie deficit, but it can also create new challenges, like missing out on fibre, not eating enough protein, or struggling with energy levels.
When your appetite drops, every meal has to work harder to tick the nutritional boxes. Here’s how to create meals that provide the nutrients your body needs.
Protein first: why protein matters for muscle and fullness
It’s good to know what to eat on Mounjaro so you can avoid losing too much lean tissue on the medication. Protein helps preserve lean mass in a calorie deficit, which can help support your metabolic rate. You should prioritise protein on a GLP-1 diet, but remember that being active, especially resistance training, is one of the best ways to maintain muscle.
How much protein should I eat on Mounjaro?
Protein needs vary, but a good goal for active adults is between 1.6–2.2g of protein per kilogram of bodyweight per day. For a 70kg person, this would mean between 112–154g a day. Bear in mind this means grams of the macronutrient, not grams of the food itself.
Knowing how to eat enough protein when appetite is low will help you maintain muscle mass and support general health. The key is to choose protein-rich foods first so you get that protein in before you feel full. Good protein sources include:
- Chicken and turkey
- Fish and seafood
- Eggs
- Real Greek yoghurt and Skyr
- Low-fat cheese
- Cottage cheese
- Lean red meat
- Tofu and tempeh
- Protein shakes
Fibre, fluids and digestion: the bit people forget
It’s not all about protein. To keep meals healthy when you’re using GLP-1 medication, you should also pay attention to fibre and fluids. Fibre helps support digestion and bowel movements, which can be affected by eating less. The good news is low-calorie wholefoods like fruit, veg and wholegrains are naturally high in gut-friendly fibre.
Foods rich in fibre include:
- Vegetables
- Salad
- Fruit
- Beans and pulses
- Lentils
- Wholegrains like oats
- Seeds
Fluids are equally important when you’re on GLP-1 medication and eating less. You may find you’re not drinking as much because you’re eating less often, but staying hydrated is vital for digestion, concentration, mood, cell health and general wellbeing.
Get into the habit of drinking water regularly, even when you’re not eating. Have some water first thing in the morning, and keep water with you throughout the day.
Vitamins and minerals on GLP-1: why food quality matters
When you’re eating less food, the meals you do eat need to tick several boxes. That doesn’t mean every meal needs to be perfect. It just means choosing foods that provide nutrition as well as calories.
Try to include a variety of vegetables or fruit, lean protein, dairy or fortified alternatives, wholegrains and healthy fats. This will support your intake of important vitamins and minerals like iron, calcium, magnesium, zinc, vitamin D and the B-vitamins.
Smaller meals that cover the basics
Large meals can feel daunting when you’re taking Mounjaro, Ozempic or Wegovy. Don’t try to force food down. Just make sure the food you do eat is balanced and high in nutrients.
A simple meal structure could look like:
- Prioritising a protein source
- Adding fruit or vegetables
- Adding a complex carbohydrate, especially if you’re active
- Making sure there’s some healthy fats
For example:
- Full-fat Greek yoghurt, berries and a small sprinkle of oats
- Eggs on wholegrain toast with a small spread of butter
- Chicken, brown rice and vegetables or leafy greens
- Salmon, potatoes and tomato or bell pepper mix
Foods that may not sit well for some people
When people search for Mounjaro foods to avoid or foods to avoid on Mounjaro, they’re often looking for a list of foods that will make the journey easier. In reality, everyone’s GLP-1 experience is different. Rather than looking for rigid rules, pay attention to how your body responds.
It can make sense to be careful with foods and meal types that are naturally harder to digest. This may include:
- Very fatty or greasy meals
- Very rich foods
- Sudden increases in fibre
- Large portions
- Highly sugary foods
Can meal replacement shakes for weight loss be useful?
There will be days when making a balanced meal feels easy, but there may also be days when your appetite is really low. Meal replacement shakes on Mounjaro can provide protein, fibre, vitamins and minerals, plus some fluid, with no overthinking.
You don’t have to replace every meal with a shake, but it can be a convenient option for busy, stressful or low-appetite days. It can also be more useful than skipping meals entirely.
Simple example day of eating
Here’s an example of what a balanced day of eating on GLP-1 medication could look like:
Breakfast
Real Greek yoghurt with fruit or berries and a spoonful of oats or granola, or a meal replacement shake.
Lunch
Wholemeal wrap or pitta with grilled chicken or sliced hard-boiled eggs and salad leaves for crunch.
Dinner
Grilled salmon, steamed new potatoes and leafy greens.
Evening snack
A small bowl of cottage cheese or Skyr with chopped fruit.
This isn’t the only way to eat, but it’s an example of how to include protein, fibre and nutrients without forcing down big portion sizes when you’re not hungry.
When to speak to your prescriber, GP or dietitian
Nutrition advice online can be helpful, but it’s no replacement for personalised medical guidance from someone who knows your medical history. Speak to your prescriber, GP or a registered dietitian if:
- You’re struggling to eat enough
- You feel dizzy or low on energy
- Side effects are affecting your daily life
- You’re concerned about nutrient intake
- You have a medical condition affecting nutrition
- You’re not sure how to balance weight loss with training
What to eat on weight loss injections is really important. GLP-1 injections reduce your appetite, but your body still needs good nutrition. Don’t worry about making the perfect meal every time. Instead, think in terms of macronutrients and micronutrients, and build your GLP-1 meals around protein, fibre, fluids, vitamins and minerals.
