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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Weight Loss Smoothie Recipes for UK Adults
Smoothies can be a convenient part of a weight management plan, but they work best alongside other lifestyle changes. If you're looking to lose weight in the UK, smoothies alone won't be enough—successful weight loss requires a sustained calorie deficit combined with physical activity. For many adults, prescription weight management options like Mounjaro and Wegovy are now available alongside dietary changes. This guide covers healthy smoothie ideas and explains the prescription weight management options available to eligible UK adults.
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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 Options Available in the UK
If you're interested in weight management in the UK, prescription medications can support your efforts alongside healthier eating and increased activity. Three weight loss injections are currently licensed for UK adults:
- Mounjaro (tirzepatide) — a dual GIP/GLP-1 receptor agonist given once weekly. In clinical trials, participants lost an average of 15–21% of their body weight over 72 weeks.
- Wegovy (semaglutide) — a GLP-1 receptor agonist, once weekly. Average weight loss was around 15% of body weight in clinical trials.
- Saxenda (liraglutide) — a GLP-1 receptor agonist given as a daily injection, with similar effectiveness to Wegovy.
All three are prescription-only medicines available through NHS specialist weight management services or private prescribing following clinical assessment. Eligibility typically requires a BMI of 30 or above, or BMI 27–29.9 with weight-related health conditions.
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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.
NHS vs Private Access — How to Find Out If You're Eligible
Access to weight loss medication on the NHS is through tier 3 specialist weight management services, usually following a GP referral. However, waiting lists can be lengthy in many areas. Prescription weight loss is also available privately through GPhC-registered online prescribers, with no NHS referral required.
To find out whether GLP-1 weight loss medication might be suitable for you, start by checking your BMI using our free BMI calculator above. If your BMI is 27 or above with weight-related conditions (such as type 2 diabetes, high blood pressure, or sleep apnoea), you may be eligible. Speak with your GP about referral to NHS services, or consider a private online clinical assessment. Either way, prescription medications work best alongside dietary improvements—smoothies included—and regular physical activity.
- 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 smoothies alone help me lose weight?
Smoothies can be part of a calorie-controlled diet, but weight loss requires a sustained calorie deficit alongside increased physical activity. A typical healthy weight loss is 0.5–1kg per week. Many UK adults find that combining dietary changes with prescription weight management options produces better results than diet alone.
What makes a weight loss smoothie recipe healthy?
A healthy weight loss smoothie should include protein (Greek yoghurt, protein powder), fibre (oats, berries, leafy greens), and be portion-controlled to fit your calorie targets. Avoid adding sugary juices, syrups, or excess sweeteners. Use water, unsweetened almond milk, or coconut milk as your base. A balanced smoothie might contain around 200–300 calories.
What's the difference between Mounjaro and Wegovy for weight loss?
Both are prescription-only weight loss injections available in the UK. Mounjaro (tirzepatide) is a dual GIP/GLP-1 agonist with average weight loss of 15–21%, while Wegovy (semaglutide) is a GLP-1 agonist with average weight loss around 15%. Both are given once weekly. A prescriber will assess which is more suitable for your individual health.
How do I access weight loss medication through the NHS?
Ask your GP for a referral to your local NHS tier 3 weight management service. Eligibility depends on BMI and weight-related health conditions. Waiting times vary by region. Alternatively, private GPhC-registered online prescribers can conduct a clinical assessment without NHS referral. Always discuss options with your GP first.
Can I use the BMI calculator on this page to check my eligibility for weight loss medication?
Yes—use our free BMI calculator above to find your BMI instantly. If your BMI is 30 or above, or 27–29.9 with weight-related conditions, you may be eligible for prescription weight management. However, a licensed prescriber must conduct a full clinical assessment before any medication is prescribed. Individual health circumstances always vary.
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.