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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Meal Plan on Mounjaro: UK Cost and Access Guide
Planning meals while taking Mounjaro requires understanding both the medication and how to access it in the UK. This guide covers the real costs of getting Mounjaro through the NHS or private prescription routes, what to expect during the online clinical assessment, and how to manage your dietary approach alongside treatment. Whether you're considering Mounjaro (tirzepatide) or comparing it to Wegovy, understanding the access route and costs helps you make informed decisions about weight management options available to UK adults.
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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.
What Does Mounjaro Cost in the UK?
Mounjaro cost in the UK varies significantly depending on whether you access it through the NHS or private prescription. On the private route, Mounjaro typically costs between £150 and £250 per month, depending on your dose and the prescribing provider. Starting doses (2.5 mg) are usually at the lower end, while maintenance doses (10–15 mg) cost more. Each KwikPen contains 4 weekly injections, so costs are usually quoted per pen or per month. The Mounjaro UK prescription requires a clinical assessment before dispensing, which may incur a separate consultation fee (typically £20–£50) depending on the provider. NHS access is free but involves a referral to specialist tier 3 weight management services, with variable waiting times across regions. Your GP can advise on local NHS availability. Using our free GLP-1 weight loss calculator can help you estimate potential costs and outcomes at different doses before committing to treatment.
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No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
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
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
NHS vs Private Route: How to Access Mounjaro
The NHS route requires a GP referral to your local integrated care board's (ICB) specialist weight management service. You'll be assessed against NICE criteria and, if approved, receive Mounjaro free through the NHS—though waiting lists can be long (sometimes 6–18 months in some regions). The private route is faster: complete an online consultation with a UK-licensed prescriber, provide health information, and receive a prescription if clinically suitable. Private prescriptions are dispensed by GPhC-registered pharmacies. Both routes require you to commit to dietary changes and increased physical activity—medication alone isn't effective. Track your progress using our free progress tracker to monitor weight loss alongside your meal plan adjustments.
- 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's the difference between Mounjaro and Wegovy in terms of cost?
Mounjaro (tirzepatide) and Wegovy (semaglutide) have similar private prescription costs (£150–£250/month), though exact pricing varies by provider and dose. Mounjaro typically has slightly higher costs at higher doses due to its maximum 15 mg strength, while Wegovy's maximum is 2.4 mg. Both are free on the NHS if approved, but NHS access varies by region. Individual costs depend on your starting dose and titration schedule.
How long does the online consultation take for a private Mounjaro prescription?
Most online consultations take 10–20 minutes. You'll answer health questions, provide medical history, and the prescriber assesses your eligibility based on BMI and weight-related health conditions. If approved, your prescription is usually issued within 24 hours and dispensed by a GPhC-registered pharmacy. You may need to provide recent blood pressure or blood test results.
Can I get Mounjaro on the NHS if I'm overweight but not obese?
Yes, if you have a BMI of 27–29.9 kg/m² and at least one weight-related health condition (such as type 2 diabetes, high blood pressure, or cardiovascular disease), you may qualify. For South Asian, Chinese, Black African, or Black Caribbean adults, lower thresholds apply. Ask your GP to assess your eligibility for NHS tier 3 services.
Do I need a meal plan prescribed with Mounjaro?
No formal prescription meal plan is required, but healthcare providers recommend a reduced-calorie diet alongside Mounjaro—typically 500 kcal below your maintenance needs for safe weight loss. Many people naturally eat less due to Mounjaro's appetite-suppressing effect. Your GP or a registered dietitian can provide personalised dietary guidance based on your health.
What happens if I can't afford Mounjaro privately—are there alternatives?
If private cost is a barrier, ask your GP about NHS referral to specialist weight management services, though waiting times vary. Alternative NHS-supported options include behaviour change programmes and tier 2 interventions. Some patients also explore whether lower-dose Wegovy might be more affordable through specific providers, though all require clinical assessment.
Ready to take control of your weight loss journey?
Start with a free BMI check, explore your GLP-1 options, or begin tracking your progress today. No sign-up. No cost. Just results.