Mounjaro for Non-Diabetics: What the Research Says

30/03/2026

You might have heard about people with type 2 diabetes using Mounjaro to help control their sugar levels and aid weight loss, but can people without diabetes use it for weight management too?

Mounjaro was first approved by the Medicines and Healthcare products Regulatory Agency (MHRA) for type 2 diabetes treatment in adults in 2022. But in 2023 – despite some misconceptions around off-label use – the MHRA authorised Mounjaro for weight loss and weight management for people who live with obesity or who are overweight with weight-related health conditions.

Here, we’ll take a look at how Mounjaro may help people without diabetes, what the science says, and who the medication might be right for.

How Mounjaro helps people manage type 2 diabetes

Mounjaro, containing the active ingredient tirzepatide, is a GLP-1 and GIP receptor agonist. GLP-1 and GIP are hormones the body creates naturally, and Mounjaro works to increase their levels.

As a result, Mounjaro helps people with type 2 diabetes produce more insulin when needed, as well as reduce the amount of glucose produced by the liver and slow down digestion. This helps lower blood sugar levels.

While Mounjaro can support weight loss in people with type 2 diabetes, adults without diabetes can also use it for weight management.

What the science says about non-diabetic use

Because Mounjaro mimics both the GLP-1 and GIP hormones, it not only slows digestion but reduces appetite and cravings, sends signals to the brain telling it that the body is full, and changes how some of the fat in the body is stored. As a result, people tend to consume fewer calories when using it, helping them lose weight.

Indeed, the clinical evidence from trials indicates that Mounjaro is effective in helping people with obesity, with a study published in 2025 showing that it reduced body weight in people with obesity by just over 20%.

Hundreds of people took part in the study. They had an average weight of 113 kilograms (almost 18 stone), and some had obesity-related health conditions like high blood pressure or high cholesterol. They took the maximum amount of either Mounjaro or Wegovy (which contains semaglutide) they could tolerate for about a year and a half.

Those on tirzepatide lost an average of 20.2%, and saw their waist sizes reduce over five centimetres (around two inches) more on average compared to those taking Wegovy.

Can people without diabetes get Mounjaro on the NHS?

It is possible to get Mounjaro on the NHS, but certain groups will be prioritised. People living with obesity who have been diagnosed with four of the weight-related health conditions listed below and a BMI of 40 or above – or 37.5 or above for those from a Black, Asian or minority ethnic background – are more likely to get priority:

Cardiovascular disease
Dyslipidaemia (abnormal fat levels in the blood)
Hypertension (high blood pressure)
Obstructive sleep apnoea
Type 2 diabetes mellitus

So, it is possible to be prescribed Mounjaro on the NHS without type 2 diabetes, but this is unlikely unless you meet all of the other criteria.

For those who are eligible, GPs generally reach out to patients themselves, rather than expect people to contact them first.

What to consider before starting Mounjaro

If you haven’t done so already, there are some things to consider before starting Mounjaro. First of all, it’s important to remember that Mounjaro is authorised for adults with a BMI of 30 or more, as well as those who have a BMI of 27 or more with weight-related health conditions.

It’s also important to be aware of the potential side effects of Mounjaro, too. While side effects are usually mild, they can include gastrointestinal concerns, including nausea, vomiting, diarrhoea and constipation.

There are also some people who should avoid Mounjaro for health and safety reasons, including those who are pregnant or breastfeeding, those with an individual or family history of medullary thyroid cancer (MTC) or multiple endocrine neoplasia syndrome type 2 (MEN2), and those with a history of pancreatitis.

If you can’t get Mounjaro via the NHS but you believe you meet the criteria and you’d like to find out more, it’s best to reach out to a clinic like The Virtual Slimming Clinic to receive some guidance and talk through your options.

Mounjaro can be a useful tool in helping people lose weight – whether you have type 2 diabetes or not – but it’s most effective as part of a clear and manageable plan that includes sensible lifestyle changes. Speaking with a healthcare professional will help you figure out whether it could help you.

Frequently asked questions

Who is eligible to receive Mounjaro on the NHS?

People with a BMI of 40 or over who live with multiple weight-related health conditions are generally prioritised by the NHS, though the BMI cutoff can vary based on ethnic backgrounds. GPs will usually contact patients directly if they meet the eligibility criteria.

What side effects can I expect when using Mounjaro?

Among the most common side effects are nausea, vomiting, diarrhoea and constipation. They’re particularly common when just starting treatment or increasing the dose. They’re usually mild in severity and become less noticeable over time, but you should speak to your clinician if you’re concerned.