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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Juice Recipes for Weight Loss and UK Medication Options
Juice maker recipes can be part of a healthy diet, but sustainable weight loss typically requires a combination of balanced nutrition, physical activity, and sometimes medical support. If you're looking for effective weight management in the UK, prescription medications alongside lifestyle changes offer evidence-based options. This guide explores both dietary approaches and the prescription weight loss medications available through the NHS and private prescribers, helping you understand your options for achieving a healthier weight.
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Calculate Your BMI Instantly
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.
Prescription Weight Loss Medication Available in the UK
Several prescription-only weight loss medications are licensed in the UK for adults with a BMI of 30 or above, or 27 or above with weight-related health conditions like type 2 diabetes, high blood pressure, or sleep apnoea.
Mounjaro (tirzepatide) is a once-weekly injection that acts as a dual GIP and GLP-1 receptor agonist. Clinical trials showed participants lost an average of 15–21% of their body weight over 72 weeks, alongside reduced-calorie diet and increased physical activity. Wegovy (semaglutide) is also a once-weekly GLP-1 injection, with average weight loss of around 15% in clinical trials. Saxenda (liraglutide) is a once-daily injection option.
These medications may help reduce appetite, support feeling fuller after meals, and assist with weight management when combined with lifestyle changes. Individual results vary significantly. All require a prescription and clinical assessment from a GP or licensed prescriber to confirm suitability.
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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
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
Accessing Weight Loss Support: NHS and Private Options
On the NHS, weight loss medication is typically accessed through specialist tier 3 weight management services — your GP can refer you if you meet eligibility criteria. However, NHS availability varies by region, and waiting lists can be substantial.
Privately, prescription weight loss medications are available through GPhC-registered pharmacies following an online clinical assessment with a UK-licensed prescriber. This route often has shorter timescales but involves private costs.
Whether choosing juice recipes as part of your diet or considering prescription support, start a conversation with your GP. They can assess your individual health, discuss whether medication is appropriate, and help you create a sustainable weight management plan tailored to your needs and circumstances.
- 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.
Can juice recipes alone help me lose weight?
Juice can be part of a healthy diet, but weight loss requires a calorie deficit combined with physical activity. Whole fruits are generally preferable to juice as they contain more fibre. For significant, sustainable weight loss, combining dietary changes with medical support may be more effective. Our GLP-1 weight loss calculator can help you explore how prescription medication might support your goals alongside lifestyle changes.
What prescription weight loss options are available on the NHS in the UK?
The NHS offers Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide) through specialist weight management services. Eligibility requires a BMI of 30 or above, or 27 with weight-related health conditions. Your GP can refer you to a tier 3 service if you meet criteria, though regional availability varies significantly.
How much weight can I expect to lose with Mounjaro or Wegovy?
Clinical trials showed average weight loss of 15–21% with Mounjaro and around 15% with Wegovy over several months, alongside a reduced-calorie diet and increased physical activity. However, individual results vary significantly — some people lose more, others less. A prescriber can discuss realistic expectations for your situation.
Do I need to follow specific recipes or diets while taking weight loss medication?
There is no single prescribed diet. Most people benefit from a balanced, reduced-calorie approach alongside increased physical activity. Your prescriber may refer you to a dietitian. Weight loss medications work best when combined with sustainable lifestyle changes, not as a replacement for them.
How do I find out if I'm eligible for prescription weight loss medication in the UK?
Start by booking an appointment with your GP. They can assess your BMI, health conditions, and medical history to determine eligibility. You can also use our free BMI calculator on this page to check your current BMI, which is the first step in understanding your options.
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.