BMI Thresholds and How Prescribers Use Them
BMI — body mass index — is a widely used screening measure calculated from your weight and height. It gives a general indication of body weight relative to height but does not capture the whole picture of a person's health.
General prescribing thresholds for Mounjaro
In many settings, prescribers follow guidance suggesting Mounjaro is appropriate for adults with:
- A BMI of 35 or above, or
- A BMI of 30 or above alongside a weight-related condition such as type 2 diabetes, high blood pressure, or raised cholesterol
Some programmes apply a lower threshold — often a BMI of 27.5 or above — for certain ethnic backgrounds, as research indicates higher metabolic risk at lower BMI values in some populations. Your prescriber will apply the criteria relevant to your situation and healthcare system.
BMI is a starting point, not the whole decision
Prescribers consider BMI alongside your medical history, other conditions, current medications, and overall health goals. A number on a BMI scale does not automatically qualify or disqualify anyone — suitability is a clinical judgement. If you have questions about whether your BMI meets the criteria used by your prescriber, the right person to ask is your own doctor or healthcare professional.
For more on how BMI requirements are discussed, see our pages on the BMI needed for Mounjaro and BMI criteria when starting Mounjaro. You can also explore what BMI you need for Mounjaro for a deeper look at how these thresholds are applied.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
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Tracking Your BMI and Progress with GLP Trackr
Once you are prescribed Mounjaro, watching your BMI change over time becomes one of the most motivating parts of the journey — and GLP Trackr's weight and body tracking features make it straightforward to do exactly that.
Weight logging and progress charts
The app's weight tracking tool lets you log your weight at any interval you choose and visualises the trend over time with clear, easy-to-read charts. Because weight loss on GLP-1 medicines is rarely perfectly linear, seeing the broader trend — rather than reacting to day-to-day fluctuations — helps you stay motivated and grounded. Your running BMI is calculated automatically as you log, so you can see how it shifts week by week.
Bringing data to your prescriber appointments
GLP Trackr's doctor report feature compiles your logged weight, dose history, and other tracked data into a clear summary you can bring to appointments. This means your prescriber has a fuller picture of your progress, making conversations about your treatment more productive.
Explore our GLP-1 calorie and nutrition calculator hub for tools to help you understand your daily energy needs alongside your weight-loss goals.
GLP Trackr is a tracking and journaling app — it is not a medical service and does not determine eligibility for any medication. Any questions about your BMI, your dose, or your suitability for treatment should always go to your prescriber or doctor, who knows your full health history.
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Frequently asked questions.
Mounjaro is generally prescribed to adults with a BMI of 35 or above, or 30 or above alongside a weight-related health condition such as type 2 diabetes. Some programmes use lower thresholds for certain ethnic backgrounds. Eligibility is always decided by your prescriber based on your full health picture.
For GLP-1 weight loss injections, a BMI of 30 or above (with a related health condition) or 35 or above is a common prescribing threshold in many settings. Exact criteria vary by healthcare programme and country, so your prescriber or doctor is the right person to confirm what applies to you.
No. BMI is a starting point, but prescribers also consider your medical history, existing conditions, other medications, and overall health goals. A clinical assessment by your own healthcare professional determines suitability — a BMI figure alone does not automatically qualify or disqualify anyone.
GLP Trackr automatically calculates your BMI as you log your weight over time, displaying it alongside progress charts so you can see trends clearly. This makes it easy to monitor how your BMI shifts throughout your treatment and share that data with your prescriber.
Yes, in some clinical programmes a lower BMI threshold — often 27.5 or above — is applied for people from certain ethnic backgrounds due to evidence of higher metabolic risk at lower BMI values. Your prescriber will apply the criteria relevant to your situation.