What BMI Criteria Are Typically Associated With Mounjaro and Wegovy?
BMI, or Body Mass Index, is a widely used screening measure calculated from your height and weight. It is not a complete picture of health on its own, but it forms part of the eligibility framework many prescribers and health programmes use when considering GLP-1 medicines like Mounjaro and Wegovy.
Commonly referenced thresholds
Based on prescribing guidelines referenced in sources such as the British National Formulary (BNF), the BMI requirements for Mounjaro and Wegovy broadly follow this pattern:
- BMI of 30 kg/m² or above — often the standard threshold for consideration
- BMI of 27 kg/m² or above — may apply where at least one weight-related condition is also present, such as type 2 diabetes, high blood pressure, or raised cholesterol
These figures represent general clinical reference points. Actual eligibility is always determined by a prescriber who will weigh up your individual health history, existing conditions, and other medicines you may be taking. A BMI figure alone does not guarantee a prescription will be issued or continued.
Why BMI is just one part of the criteria
Prescribers consider BMI alongside other factors — weight-related health conditions, previous weight-management attempts, and overall suitability. Understanding the full eligibility criteria for Mounjaro gives a clearer picture of everything a prescriber typically reviews. You can also explore how BMI applies specifically to Mounjaro prescribing in more depth.
BMI and different populations
Standard BMI thresholds were developed using data that may not reflect all ethnicities equally. Some clinical guidelines use lower BMI cut-offs for certain population groups. Your prescriber is the right person to discuss how BMI thresholds apply to your own circumstances.
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Knowing your BMI is a useful starting point, but tracking how your body measurements change over time tells a much richer story than any single number.
GLP Trackr's weight and body tracking feature lets you log your weight regularly and watch your progress build into a clear visual chart week by week. As your weight changes during your treatment, the app keeps a running record so you can see genuine trends rather than reacting to daily fluctuations. You can also log body measurements alongside weight, giving you a fuller view of how your body is changing.
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For a broader look at calorie and nutrition targets that sit alongside your BMI and weight goals, the GLP Trackr calorie and nutrition calculator hub is a helpful place to start. You can also read more about BMI and Mounjaro in our dedicated guide.
GLP Trackr provides general information and tracking tools — it is not a substitute for advice from your prescriber or doctor, who knows your full health history. Any questions about whether you meet the criteria for Mounjaro or Wegovy should be directed to your healthcare professional.
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Frequently asked questions.
Clinical guidelines commonly reference a BMI of 30 kg/m² or above, or 27 kg/m² or above where a weight-related health condition is present. Your prescriber will assess your full health picture to determine whether Mounjaro is appropriate for you.
Both medicines share broadly similar BMI reference thresholds in prescribing guidelines — typically 30 or above, or 27 or above alongside a weight-related condition. However, suitability for either medicine depends on individual clinical assessment by your prescriber.
No. BMI is one criterion among several. Prescribers also consider existing health conditions, other medicines, and overall suitability. Meeting a BMI threshold does not automatically mean a prescription will be issued — that decision rests entirely with your healthcare professional.
GLP Trackr lets you log your weight regularly and view it as a chart over time. While the app does not replace clinical assessment, tracking your weight trend week by week can help you understand your progress and have more informed conversations with your prescriber.
A lower BMI threshold of around 27 kg/m² is commonly cited when certain weight-related conditions are present. Whether this applies to you is a clinical decision — discuss your specific situation with your prescriber or doctor.