The UK's most complete GLP-1 guide
Every Question Answered. Every Side Effect Explained.
- How GLP-1 medications work
- Mounjaro vs Wegovy compared
- Injection instructions
- Side effects & solutions
- What to eat on treatment
- FAQs answered
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New Medications for Type 2 Diabetes in the UK
Type 2 diabetes management has evolved significantly in recent years, with new medications now available in the UK that work differently to traditional diabetes treatments. These newer options include GLP-1 receptor agonist pills and injectables, which have shown promising results in clinical trials for both blood sugar control and weight management. If you've been diagnosed with type 2 diabetes or prediabetes, understanding the latest treatment options available through the NHS or privately can help you and your GP make informed decisions about your care. This UK health guide covers the current medications, how they work, and who may be eligible for them.
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Enter your height and weight below. Supports both imperial (stone & lbs) and metric (kg). Results include NHS category, healthy weight range, and ethnicity adjustments.
What Is BMI and Why Does It Matter?
Body Mass Index (BMI) is the most widely used screening tool for assessing whether your weight falls within a healthy range. Used by the NHS, GPs, and weight management services across the UK, BMI provides a quick snapshot of your weight relative to your height. The formula is simple: your weight in kilograms divided by your height in metres squared (kg/m²).
While BMI isn't a perfect measure — it doesn't account for muscle mass, bone density, or fat distribution — it remains the standard first step in identifying potential weight-related health risks including type 2 diabetes, cardiovascular disease, high blood pressure, and certain cancers.
The NHS also recommends adjusted thresholds for people of South Asian, Chinese, or Black African heritage — a BMI of 23 or above is classified as overweight, and 27.5 as obese. Our calculator includes this adjustment as a one-click toggle.
How Modern Type 2 Diabetes Medications Work
New type 2 diabetes treatments work by mimicking or enhancing the body's natural hormone pathways. GLP-1 receptor agonists (such as semaglutide, found in Wegovy and Ozempic) activate the GLP-1 hormone pathway, which helps regulate blood sugar levels, reduce appetite, and slow gastric emptying. Tirzepatide (Mounjaro) works as a dual GIP and GLP-1 receptor agonist—activating two hormone pathways simultaneously, which may provide additional benefits for blood sugar control and weight management.
These medications differ from older treatments like metformin (which reduces glucose production) or insulin (which replaces or supplements the body's own insulin). They're particularly useful for people with type 2 diabetes who also have excess weight, as they address both conditions simultaneously. Clinical evidence shows these newer options can reduce HbA1c (long-term blood sugar marker) and support sustainable weight loss, often at a rate of 5–15% of body weight depending on the medication and individual response. Your GP or diabetes specialist can assess which option aligns best with your nhs health advice and personal circumstances.
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How It Works
Three simple steps to understand your weight and take action.
Enter your height and weight in our free calculator. Get your BMI, NHS category, healthy weight range, and ethnicity-adjusted thresholds instantly.
If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.
Use our progress tracker to log your weight weekly, visualise your journey with charts, and stay motivated — all stored privately in your browser.
Free Weight Loss Tools & Guides
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UK Eligibility and Access Routes for New Diabetes Treatments
Access to newer type 2 diabetes medications in the UK varies depending on whether you pursue NHS or private routes. Through the NHS: Medications are available via your GP or diabetes specialist clinic, typically for adults with type 2 diabetes or prediabetes. NICE (the National Institute for Health and Care Excellence) provides guidance on when these treatments are appropriate, usually when lifestyle changes alone have not achieved adequate blood sugar control.
Privately: These medications can be prescribed through online consultations with UK-licensed prescribers, without requiring an NHS referral. A clinical assessment will determine eligibility based on your BMI, health history, and diabetes status. Use our BMI calculator to check your current weight category, and discuss any new treatment options with your GP before starting privately. Your healthy weight uk targets will be considered as part of the overall management plan.
- Dual GIP/GLP-1 receptor agonist
- Up to 22.5% body weight loss (SURMOUNT-1)
- Weekly injection, dose escalation over 20+ weeks
- Available via private prescription in the UK
- Doses: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg
- GLP-1 receptor agonist
- Up to 15–17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg → 0.5mg → 1mg → 1.7mg → 2.4mg
Mounjaro vs Wegovy: Head-to-Head
A side-by-side comparison of the two most popular GLP-1 weight loss medications available in the UK.
| Feature | Mounjaro | Wegovy |
|---|---|---|
| Drug class | Dual GIP/GLP-1 agonist | GLP-1 agonist |
| Active ingredient | Tirzepatide | Semaglutide |
| Avg. weight loss | 15–22.5% | 12–17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20–32 weeks | 16–20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | £150–£250/month | £150–£300/month |
| Common side effects | Nausea, diarrhoea, constipation | Nausea, vomiting, diarrhoea |
Data sourced from SURMOUNT-1 and STEP 1 clinical trials. Costs are approximate and vary by provider. Always consult a prescriber.
Am I Eligible for Weight Loss Medication?
In the UK, eligibility for GLP-1 weight loss medications like Mounjaro and Wegovy is based on your BMI and overall health profile.
- BMI of 30 or above (obese)
- Age 18 or over
- No contraindicated conditions
- Committed to lifestyle changes
- BMI of 27 or above
- Plus type 2 diabetes
- Or high blood pressure
- Or obstructive sleep apnoea
Use our BMI calculator to check whether your BMI falls within the eligible range.
How We Built These Tools
Every calculator and guide on myweightcheck is built with accuracy and transparency in mind. Our BMI calculator uses the standard WHO formula with NHS-aligned category thresholds. Our GLP-1 projections are modelled on published clinical trial data from SURMOUNT and STEP studies.
All data stays on your device. We don't require sign-ups, and we don't store your health information on any server. Your progress tracker saves data locally in your browser using localStorage, so only you can see it.
We're based in the UK and our tools are designed specifically for UK users — supporting stone & lbs by default, referencing NHS guidelines, using NICE-approved medication data, and linking to GPhC-registered pharmacies.
Frequently Asked Questions
Common questions about BMI, weight loss medications, and our free UK tools.
What is the difference between Ozempic and Wegovy?
Both contain semaglutide, but Ozempic is licensed for type 2 diabetes management (doses up to 2 mg). Wegovy is the licensed weight management version (up to 2.4 mg). Ozempic is not approved for weight loss in the UK, though off-label use occurs. Wegovy is the prescription-only medicine specifically authorised for weight management.
Can new type 2 diabetes pills help with weight loss?
Yes. GLP-1 and GIP/GLP-1 medications like Wegovy and Mounjaro are designed to help with both blood sugar control and weight management. Clinical trials show average weight loss of 14–21% of body weight, though individual results vary. These work best alongside reduced-calorie diet and physical activity.
How do I access new diabetes medications on the NHS in the UK?
Speak to your GP about your type 2 diabetes management. Your GP can refer you to a diabetes specialist clinic or tier 3 weight management service, where eligibility will be assessed. Availability varies by region (ICB), and waiting times can be lengthy in some areas.
Are there side effects with new type 2 diabetes pills?
Common side effects include nausea, diarrhoea, constipation, and reduced appetite—typically mild and reduce over time. Serious side effects are rare but may include pancreatitis or gallbladder issues. Your prescriber will discuss individual risks and monitoring before starting treatment.
How can I track my progress with new diabetes treatment?
Your GP will monitor HbA1c (blood sugar control) and weight regularly. You can track your own weight using our free progress tracker, and use our BMI calculator to monitor changes in your weight category. Weight management works best with consistent monitoring and lifestyle support. ```
Ready to take control of your weight loss journey?
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