What to Eat on Mounjaro for Weight Loss

If you’re using Mounjaro for weight management, you’re probably wondering how to implement healthy changes to your diet for sustainable weight loss. Here, our experts discuss Mounjaro diet tips to help you get the best results and minimise side effects.

Article summary:

• It’s important to maintain a balanced diet to help support weight management treatments like Mounjaro. You don’t need to restrict yourself to notice results, but you may need to make a few lifestyle changes.
• Processed foods are usually low in nutritional value and high in fats and sugars, so choose whole foods where possible.
• Try to include one portion of lean protein in every meal to help maintain muscle mass while you're losing weight.

Importance of nutrition and diet when using Mounjaro

Mounjaro belongs to a group of medicines called GLP-1s, which work on the parts of your brain that control hunger and fullness. This helps to reduce your appetite and make you feel fuller for longer.

When you’re eating less overall, it’s even more important to prioritise a balanced diet. Knowing what to eat can help you make choices that support your weight management journey, such as choosing proteins to help you maintain lean muscle mass and keep you feeling full. [1]

Foods to eat on Mounjaro

So, what foods should you be prioritising?

Protein

Eating enough protein may help to preserve lean mass, including muscle, while losing weight. [1] That’s why we recommend including at least 1 portion of lean meat or plant-based protein in every meal while you're using weight loss medication. [2]

A balanced diet rich in protein could also keep you feeling fuller for longer, so it may help you eat smaller portions and reduce feelings of nausea. [1]

Fibre

Increasing your fibre intake is important while taking Mounjaro. It can help boost digestive health, regulate blood sugar levels to complement the effects, and also help ease common side effects you may get from your treatment, like constipation. [3]

Complex carbohydrates

Contrary to some trending weight loss strategies which may ask you to cut out carbohydrates completely, you can still include them in your meals while on Mounjaro. In fact, they can be a good source of energy to help keep you going through the day. [4]

Foods like oats, wholemeal bread and brown rice can also be rich in fibre, and if you’ve been tolerating digestive side effects well, they can be a great addition to your diet. [5]

Healthy fats

Also known as unsaturated fats, healthy fats are a good way to help regulate blood sugar levels and reduce inflammation. Avocados and peanut butter are well-known healthy fats along with seeds such as pumpkin, sesame and sunflower and other plant oils. [6]

Vegetables

Adding some colour to your meals with vegetables is a great way to add fibre, essential vitamins and minerals to your diet. You may prefer steamed or sauteed vegetables if raw ones aren’t your favourite. [7]

Foods to avoid while on Mounjaro

Although you don’t necessarily need to completely avoid the foods in this section, moderation is important as they could have a negative impact on your weight management plans.

High-fat foods

Some fat in your diet is essential because your body needs it for energy, essential fatty acids, and absorbing fat-soluble vitamins like A, D, E and K. [8] Fried, oily foods are often thought of as being “bad for you”, because they tend to lack nutritional value and contain too much unhealthy fat.

When you’re trying to manage your weight, try to cut down on over-processed foods and baked goods, and keep an eye on portion control if you decide to enjoy them. [8]

Alcohol

The NHS advises you not to drink any alcohol units when taking GLP-1s like Mounjaro, because it may worsen digestive side effects like nausea and vomiting. [9]

As much as you might enjoy it at the time, alcohol can sometimes leave you feeling more dehydrated afterwards. Experiencing this alongside the common side effects of tirzepatide could make you feel even more drained. However, if you do drink, be sure to stay hydrated by drinking plenty of water to help keep you feeling refreshed.

Sugary foods

If you’re trying to maintain a healthy lifestyle as part of your weight management plan, try to enjoy sugary foods in moderation. Sugary snacks and drinks are usually low in nutritional value and high in calories, so consuming them too frequently could set you back on your weight loss journey.

You don’t need to be too restrictive, but cutting down on refined, sugary foods is a good step to take while on Mounajro.

Fizzy drinks

If you sometimes experience reflux, burping, trapped gas or bloating while on Mounjaro, having fizzy drinks could make these side effects feel more uncomfortable. Instead, try swapping them for herbal teas like peppermint or lemon and ginger, then add honey as a natural sweetener if preferred. [9]

Ultra-processed foods (UPFs)

Quick, ready-made meals can be more convenient when you don’t have enough time to cook, but it’s best if they don’t make up the majority of your diet. Ultra-processed food (or UPF) refers to foods or snacks made with non-kitchen ingredients like preservatives or artificial flavouring, and could be anything from frozen nuggets to crisps.

Although UPFs may be full of flavour, they may not have high nutritional value and could be high in salt, sugar and saturated fats. You don’t need to ban them completely, but try to prioritise maintaining balanced meals. [10]

Dairy

Some people find that rich, fatty or creamy foods can worsen side effects of Mounjaro, such as nausea and reflux. [11] If this applies to you, try swapping out full-fat milk for alternatives like oat or almond milk. [8]

Staying hydrated while using Mounjaro

Tirzepatide is the active ingredient in Mounjaro and it can trigger stomach-related side effects for some people either at the start of the treatment, or when you move up a dose (titration).

Nausea is a common symptom, and if you’ve been vomiting, or you’ve had diarrhoea, it’s very important to drink lots of fluids to avoid dehydration. Water is the safest, most effective way to stay hydrated throughout the day. Aim to drink about 6-8 glasses daily, which is roughly 1.5 to 2 litres.

Drinks to avoid

Taking Mounjaro doesn’t mean you have to ban beverages like coffee, fizzy drinks or even alcohol, but it might help to cut down during your treatment.

Choosing to reduce your caffeine intake or limiting the amount of carbonated drinks and alcohol units can help ease side effects like bloating or nausea. [9]

What to drink

• Plenty of water (6-8 glasses a day)
• Herbal teas (peppermint can help with side effects)
• Decaffeinated coffee or tea
• Non-dairy alternatives (almond or oat milk)

Example Mounjaro diet plan

Sometimes all you need is a rough guide on what to eat on Mounjaro. Here’s an example of what to eat in a week, which can help you with grocery shopping and meal prepping in advance. Of course, you can adjust where necessary and this is fully flexible.

Mounjaro diet alternatives

Healthy alternatives

You don’t need to miss out on your favourite go-to meals while using Mounjaro. Making changes to your portion sizes or even how you cook your food could make a difference to your overall diet, and support you better on your weight management journey.

Vegan or vegetarian alternatives

Whether you’re vegan, vegetarian or simply looking to eat more plant-based meals, these simple swaps can help you build a balanced Mounjaro diet that suits your preferences.

Mounjaro diet FAQs

Is there a "Mounjaro diet"?

There’s no specific or “strict” diet to follow while using Mounjaro. Everyone is different and not all patients respond to the medication in the same way. The nature of the treatment means that you’ll have a reduced appetite and are therefore likely to take in fewer calories. [1]

This places more importance on the quality of your diet, and you can make small changes to your food choices to improve your meals. Try to make your plates colourful with more vegetables, support muscle mass by increasing your protein intake, and eat healthy fats for slow-release energy.

Can I drink coffee while using Mounjaro?

Yes, you can still drink coffee while using Mounjaro. However, if coffee worsens your nausea, reflux or bloating, try drinking decaffeinated coffee instead or limiting your intake overall until side effects settle.

Can I eat too much on Mounjaro?

If your portion sizes haven’t changed much since starting Mounjaro, you may feel discomfort, stomach cramping or nausea. Try not to eat past the point of feeling full, and do your best to eat slowly. A small meal that includes protein, some vegetables and a slow-releasing carbohydrate may feel satisfying, even if it looks modest on the plate.

Can I eat too little on Mounjaro?

Mounjaro works by reducing your appetite, and feeling less hungry could make it easy to undereat by accident. That’s why it’s very important to prioritise meals rich with protein, fibre and vitamins to keep you energised. [1]

Can I drink alcohol while on Mounjaro?

Typically yes, although the NHS would recommend that you limit your alcohol units while taking GLP-1s like Mounjaro. [9] Alcohol can leave you feeling dehydrated and make stomach-related side effects feel more intense.

Does your diet impact side effects of Mounjaro?

Yes, it could. Eating a lot of spicy foods, high-fat foods or too much dairy may worsen digestive side effects like nausea and diarrhoea. [1] If you experience ongoing side effects after making adjustments to your diet, speak to your prescriber.

At MedExpress, we offer online consultations with regular clinical check-ins, and a range of weight loss treatments including Mounjaro, Wegovy Pen, Wegovy Pill and Foundayo and our team can help you find the right treatment for you.

References

1. Dietary advice for people with type 2 diabetes using tirzepatide (Mounjaro) [Internet]. Cambridge University Hospitals. 2026 [cited 2026 Oct 21]. Available from: https://www.cuh.nhs.uk/patient-information/dietary-advice-for-people-with-type-2-diabetes-using-tirzepatide-mounjaro/
2. Moon J, Koh G. Clinical Evidence and Mechanisms of High-Protein Diet-Induced Weight Loss. Journal of Obesity & Metabolic Syndrome [Internet]. 2020 Sep 30;29(3):166–73. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7539343/
3. Reynolds AN, Akerman AP, Mann J. Dietary fibre and whole grains in diabetes management: Systematic review and meta-analyses. Ma RCW, editor. PLOS Medicine [Internet]. 2020 Mar 6;17(3):e1003053. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7059907/
4. England N. NHS England » Tirzepatide (Mounjaro®) in primary care for weight management: information on wraparound care [Internet]. England.nhs.uk. 2026 [cited 2026 Oct 22]. Available from: https://www.england.nhs.uk/long-read/tirzepatide-in-primary-care-for-weight-management-information-on-wraparound-care/
5. NHS. The Eatwell Guide [Internet]. NHS. 2022 [cited 2026 Oct 21]. Available from: https://www.nhs.uk/live-well/eat-well/food-guidelines-and-food-labels/the-eatwell-guide/
6. Know the facts about fats [Internet]. Harvard Health. 2021 [cited 2026 Oct 21]. Available from: https://www.health.harvard.edu/healthy-aging-and-longevity/know-the-facts-about-fats
7. NHS. The Eatwell Guide [Internet]. NHS. 2022 [cited 2026 Oct 21]. Available from: https://www.nhs.uk/live-well/eat-well/food-guidelines-and-food-labels/the-eatwell-guide/
8. NHS. Facts about Fat [Internet]. NHS. 2023 [cited 2026 Oct 21]. Available from: https://www.nhs.uk/live-well/eat-well/food-types/different-fats-nutrition/
9. NHS website. Tirzepatide [Internet]. nhs.uk. 2026 [cited 2026 Oct 22]. Available from: https://www.nhs.uk/medicines/tirzepatide/
10. National Health Service. Eating Processed Foods [Internet]. nhs.uk. 2022 [cited 2026 Oct 22]. Available from: https://www.nhs.uk/live-well/eat-well/how-to-eat-a-balanced-diet/what-are-processed-foods/
11. NHS website. Tirzepatide [Internet]. nhs.uk. 2026 [cited 2026 Oct 22]. Available from: https://www.nhs.uk/medicines/tirzepatide/