Mounjaro diet: what to eat on Mounjaro?

Cravings feel quieter, you get halfway through a meal and realise you're actually full, and food just doesn't take up the same space in your head anymore. These are all common experiences on Mounjaro. They can feel a bit strange at first, especially when you're not quite sure what your plate should look like now.

This guide will help you understand what to eat, how to build simple meals, and what tends to work best when your appetite has changed.

How does Mounjaro work?

Mounjaro is a medication called tirzepatide. It works by mimicking two gut hormones, GLP-1 and GIP, which help to regulate appetite, digestion and blood sugar levels.

In simple terms, it reduces how hungry you feel, slows how quickly food leaves your stomach so you stay fuller for longer, and helps your body manage blood sugar more steadily.

That’s why what you eat still matters, even though the medication is doing a lot of the appetite work for you.

What are the best foods to eat on Mounjaro?

There isn’t a single prescribed Mounjaro diet. What works best is a balanced, flexible way of eating built around whole foods that keep you nourished and comfortable.

Protein-rich foods:

Protein is one of the most important nutrients to focus on while taking Mounjaro. It helps you stay full and protects muscle while you lose weight.

The general recommendation is around 0.8g of protein per kilogram of body weight per day. During active weight loss, this often increases to around 1.2 to 1.6g per kilogram. Research also shows that people using GLP-1 medications may be at higher risk of protein insufficiency, which can contribute to muscle loss if intake is too low.

A simple way to approach this is to include a source of protein at each meal. For many people, this works out to roughly 20 to 30g per meal, depending on their needs.

Animal sources:

• Chicken breast (100g, cooked): around 32g protein
• Salmon (100g, grilled): around 25g protein
• Lean beef or lamb (100g, cooked): around 30g protein
• Eggs (2 large): around 14g protein
• Greek yoghurt (200g pot): around 12g protein

Plant sources:

• Lentils (120g, cooked): around 9g protein
• Chickpeas (105g, cooked): around 8g protein
• Tofu (100g, firm): around 8g protein
• Edamame (100g, cooked): around 11g protein
• Beans (120g, cooked): around 8g protein

Plant proteins tend to be lower per portion than animal proteins, so you may need slightly larger servings or an extra source at each meal to reach 20 to 30g.

Fibre-rich foods:

Fibre slows digestion, supports gut health and helps with two common Mounjaro side effects: constipation and diarrhoea. There are two types of fibre, both useful.

Insoluble fibre (in wholegrains, fruit and veg skins, nuts and seeds) adds bulk and helps things move through your gut.

Soluble fibre (in oats, bananas, apples, beans and lentils) absorbs water and slows digestion.

Most plant foods contain a mix of both, so you don't need to pick a side. Aim for around 30g per day.

If you're dealing with constipation, lean a bit more towards insoluble fibre and drink plenty of water. If you're dealing with diarrhoea, lean towards soluble fibre and ease off raw veg, skins and seeds for a few days until things settle.

Complex carbohydrates:

Complex carbohydrates break down slowly, keeping your blood sugar and energy levels steady. Refined carbs like white bread and sugary snacks do the opposite. They spike your blood sugar fast and then leave you crashing.

There's no need to follow a strict low-carbohydrate or keto diet on Mounjaro. Many people find those approaches hard to stick with long term.

Examples include:

• Brown rice
• Wholegrain bread
• Oats
• Quinoa
• Pearl barley
• Sweet potato
• Legumes

Fruit and vegetables:

Aim for at least five portions a day, with half your plate made up of vegetables where possible.

Some people worry about the sugar in fruit, but whole fruit works differently from other sugary foods. The fibre in whole fruit slows how quickly the sugar is absorbed, so it's released more gradually than it would be from fruit juice or sweets. Whole fruit also tends to be more filling than juice or smoothies.

Healthy fats:

Fats often get a bad reputation, but the right kinds matter. They make meals more filling, help your body absorb certain vitamins, and add flavour, which can be especially helpful when your portions are smaller on Mounjaro.

Focus on unsaturated fats. These are the ones found in plant foods and oily fish, and they support heart health.

Good sources include:

• Olive oil
• Avocado
• Nuts and seeds
• Oily fish, such as salmon, mackerel, sardines and anchovies

Try to keep saturated fats (in butter, fatty cuts of meat, full-fat dairy and palm oil) and trans fats (in some processed foods, takeaway fried foods and baked goods) to smaller amounts. They raise your bad cholesterol over time, and because Mounjaro slows digestion, they can also sit heavily in the stomach and worsen side effects like nausea and reflux.

Dairy:

Dairy can absolutely be part of your diet in moderation. It’s a useful source of protein and calcium.

Full-fat dairy is higher in saturated fat, so lower-fat options like semi-skimmed milk, Greek yoghurt and reduced-fat cheese tend to be better everyday choices. Full-fat versions are still fine in smaller amounts.

Staying hydrated:

Aim for around 6 to 8 glasses of fluid per day. Mounjaro can reduce your thirst, so you may need to make a conscious effort to drink regularly.

This becomes even more important if you’re experiencing side effects like vomiting or diarrhoea, which can increase your risk of dehydration.

Water, herbal teas and sugar-free squash all count.

How can I get enough vitamins and minerals on Mounjaro?

Mounjaro helps with weight loss partly by reducing how much you eat. With smaller portions, it's worth being mindful that you're still getting a good range of vitamins and minerals across the day.

A 2026 review of nearly half a million adults on GLP-1 medications found that low intake of iron, vitamin D, calcium and protein was common. The most likely explanation is smaller portions combined with slower digestion. Many people in the UK are already low in vitamin D before starting any treatment.

Iron is found in red meat, lentils, beans, tofu, leafy greens like spinach, and fortified cereals. Calcium is mostly in dairy, fortified plant milks, tofu and leafy greens. For protein, see the section above. Vitamin D is harder to get from food alone, but oily fish, eggs and fortified dairy all contribute. The NHS recommends a daily 10 microgram vitamin D supplement for all UK adults from October to March, when sunlight isn't strong enough for your body to make it.

You don't need to overhaul everything or stack up on supplements. The aim is to make the food you do eat work harder by choosing nutrient-dense options. If you notice symptoms like ongoing fatigue, hair changes or low mood, speak to your GP.

How many calories should I eat on Mounjaro?

The shortest answer is: it depends.

Your total daily energy expenditure (TDEE) is how many calories your body uses in a day, and it varies based on your height, weight, sex, age and how active you are. Two people can be the same weight and need very different amounts of food.

For weight loss, a typical guidance is to eat around 500 to 750 calories below your TDEE. You can estimate your calorific needs using our TDEE calculator.

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Most people on Mounjaro naturally eat less because the medication suppresses appetite, which puts them in a calorie deficit anyway. If you're losing weight steadily, you're already in a deficit, so there's no need to count anything.

Tracking can be useful in specific situations though. If you hit a plateau, find your weight loss has slowed, or want to check your portions are landing where you think they are, a week or two of tracking can help you spot patterns. It's a tool to use when needed, not something you have to keep up forever.

What matters more is not going too low. As a general guide, women shouldn't drop below around 1,200 calories per day and men shouldn't drop below around 1,500. Consistently eating less than this can lead to fatigue, hair thinning, muscle loss and nutrient deficiencies, and may slow your metabolism. If you're unsure what's right for you, speak to your GP or a registered dietitian.

What does a balanced plate look like on Mounjaro?

A simple way to build your meals is to use the balanced plate model:

• Half your plate: non-starchy vegetables (broccoli, peppers, salad, courgette)
• One quarter: lean protein
• One quarter: complex carbohydrates
• A small amount of healthy fat

This approach helps keep your blood sugar steady, supports digestion, and keeps meals balanced without needing to track everything closely.

Portion size often adjusts naturally on Mounjaro, but it still helps to pay attention to your hunger and fullness cues. Try to stop eating when you feel comfortably full rather than finishing everything on your plate.

What if I follow a vegetarian, vegan, halal, kosher or gluten-free diet?

Mounjaro works the same regardless of how you eat. You can still build a balanced plate on any of these diets.

Vegetarians can rely on eggs, dairy and plant proteins like tofu, tempeh, lentils, chickpeas and beans.

Vegans get all their protein from plants. Tofu, tempeh, lentils, chickpeas, beans and edamame are all good options. It's worth paying extra attention to vitamin B12, iron and omega-3 intake, as these are harder to get from a fully plant-based diet.

Gluten-free eaters can swap wheat-based grains for brown rice, quinoa, buckwheat or certified gluten-free oats.

If you eat halal or kosher, the same balanced plate works. Just choose meat that meets your usual requirements.

If you have specific dietary needs or health conditions, it's a good idea to check in with a GP or registered dietitian.

What foods should you avoid on Mounjaro?

There aren't any completely forbidden foods on Mounjaro, but some can work against your progress or make side effects worse.

Try to limit:

• Ultra-processed foods like crisps, fast food and sugary snacks
• High-fat and fried foods, which can trigger nausea
• Refined carbohydrates, such as white bread and pastries
• Spicy foods, especially in the early weeks and after dose increases
• Alcohol, which is worth limiting
• Carbonated drinks, which can increase pressure in the stomach and cause bloating

Suggested swaps:

• Butter or lard → olive oil or rapeseed oil
• Full-fat dairy milk → semi-skimmed, skimmed or oat milk
• Cream → Greek yoghurt
• White bread or pasta → wholegrain versions
• Crisps → rice cakes or roasted chickpeas
• Sugary snacks → fruit or dark chocolate
• Fried chicken or chips → oven-baked versions
• Fizzy drinks → water with lemon or herbal tea
• Takeaway meals → simple home-cooked versions

Mounjaro meal plan: a 7-day eating plan to get you started

Day 1 (around 1,700 kcal)

Breakfast: Porridge with berries and chia seeds

Lunch: Chicken salad with olive oil dressing

Dinner: Salmon, brown rice and broccoli bowl

Snack: Greek yoghurt with berries and almonds

Day 2 (around 1,650 kcal)

Breakfast: Boiled eggs with wholegrain toast

Lunch: Lentil and vegetable soup

Dinner: Chicken stir-fry with quinoa

Snack: Apple with peanut butter

Day 3 (around 1,700 kcal)

Breakfast: Greek yoghurt with oats and berries

Lunch: Tuna salad with wholegrain crackers

Dinner: Lean beef mince with sweet potato and veg

Snack: Carrot sticks with hummus

Day 4 (around 1,650 kcal)

Breakfast: Smoothie with banana, oats and protein yoghurt

Lunch: Chickpea and spinach curry with brown rice

Dinner: Baked chicken, brown rice and veg

Snack: Handful of almonds

Day 5 (around 1,700 kcal)

Breakfast: Porridge with banana and flaxseeds

Lunch: Egg and avocado wholegrain sandwich

Dinner: Salmon with quinoa and roasted vegetables

Snack: Handful of nuts

Day 6 (around 1,650 kcal)

Breakfast: Greek yoghurt with berries

Lunch: Chicken and vegetable soup

Dinner: Lean lamb with brown rice and greens

Snack: Oatcakes with cottage cheese

Day 7 (around 1,700 kcal)

Breakfast: Scrambled eggs with wholegrain toast

Lunch: Tuna and bean salad

Dinner: Roast chicken with potatoes and veg

Snack: A few squares of 70% dark chocolate with strawberries

*Please note that calories shown are a guide. Your needs may vary.

Taking a different medication?

If you're using Wegovy, Saxenda or Orlistat instead, we've got dedicated guides for each: what to eat while taking Wegovy, foods to avoid on Saxenda and a diet plan for Orlistat.

What are the best snacks on Mounjaro?

Smaller appetites mean snacks need to count. The best ones combine protein with fibre or healthy fat to keep you full between meals without overwhelming your stomach.

• Greek yoghurt with berries
• Fruit with nut butter
• Oatcakes with cottage cheese
• Carrot sticks with hummus
• A small handful of almonds
• Boiled eggs

Should I exercise on Mounjaro?

Mounjaro doesn't replace movement. Pairing the medication with regular activity helps you lose more fat (rather than muscle), supports your mood and energy, and builds habits that help keep weight off after treatment ends.

The NHS recommends at least 150 minutes of moderate activity per week, plus two strength sessions. That's the same general guidance for all adults, and it works well alongside Mounjaro.

Why strength training matters

Losing weight on Mounjaro means losing fat, but some muscle loss can happen alongside it. This is true of weight loss in general, and especially when appetite drops sharply, as it does on Mounjaro. Strength training, paired with enough protein, helps protect your lean muscle so more of the weight you lose comes from fat.

You don't need a gym. Bodyweight exercises (squats, lunges, push-ups), resistance bands or light weights at home work well. Two or three short sessions a week is a good starting point.

Meal prep tips for Mounjaro

Cooking can feel like a lot when your appetite and energy are lower. Keeping things simple can really help.

• Batch cook proteins like chicken, eggs or salmon at the start of the week
• Pre-cut vegetables after shopping so they’re easy to grab
• Freeze portions of soups or stews for low-energy days
• Keep easy options on hand like Greek yoghurt, tinned fish, oatcakes and frozen veg
• Cook when your energy is highest

How can diet help manage Mounjaro side effects?

Side effects are common in the early weeks and after dose increases. What you eat can make a real difference.

Most side effects settle as your body adjusts. If anything feels severe or persistent, speak to your prescriber.