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 Breakfast Smoothie Recipes
Breakfast smoothies can be a practical part of a weight management routine, especially when made with nutritious, lower-calorie ingredients. However, if you're looking to lose weight in the UK, it's worth knowing that prescription weight loss medications are now available for eligible adults. These work alongside dietary changes like healthy breakfasts. This guide covers smoothie recipes and how prescription options fit into your weight loss journey.
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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.
Prescription Weight Loss Options Available in the UK
For UK adults with a BMI of 30 or above (or 27–29.9 with weight-related health conditions like type 2 diabetes or high blood pressure), prescription weight loss medications are available. Three main options are currently licensed in the UK:
- Mounjaro (tirzepatide) — a dual GIP and GLP-1 receptor agonist, given as a once-weekly injection. Clinical trials showed an average weight loss of 15–21% of body weight over 72 weeks.
- Wegovy (semaglutide) — a GLP-1 receptor agonist, also given once weekly. Evidence from the STEP trials showed an average weight loss of around 15% of body weight.
- Saxenda (liraglutide) — a GLP-1 receptor agonist given as a daily injection, with evidence supporting approximately 5–clinically studied weight loss.
These prescription medications work by helping regulate appetite and may support feeling fuller after smaller meals. Individual results vary significantly, and these medications are always used alongside dietary changes and increased physical activity — not instead of them. All three are prescription-only and require a clinical assessment before being prescribed.
Clinically BackedWeight Loss
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 Access — How to Find Out If You're Eligible
In the UK, you can access prescription weight loss medication through the NHS or privately. NHS access is through specialist tier 3 weight management services — usually requiring a referral from your GP, though waiting lists in many areas can be several months long. Availability varies significantly by region and ICB (Integrated Care Board).
Private access is available through GPhC-registered online pharmacies following an online clinical assessment. This route does not require an NHS referral and appointments are typically available within days. To find out if prescription weight loss medication is suitable for you, speak with your GP or book a consultation with a UK-licensed prescriber. Your BMI, health history, and current medications will be assessed.
Use our free BMI calculator above to check whether you fall into the eligible range for prescription weight loss treatment. If you're interested in exploring medication options, our GLP-1 weight loss calculator can help you estimate potential weight loss at different doses based on clinical trial data. Remember that breakfast nutrition is still important — smoothies made with protein, healthy fats, and fibre (like oats, nut butter, and berries) can complement a weight management plan whether you use medication or not.
- 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 I use breakfast smoothies alone to lose weight without medication?
Yes, healthy breakfast smoothies can support weight loss as part of a calorie-controlled diet and exercise routine. However, if you have a BMI of 30 or above (or 27–29.9 with weight-related health conditions), prescription weight loss medications are also available on the NHS or privately. A GP or prescriber can help you decide which approach is right for you.
What ingredients should I use in a weight loss smoothie?
Focus on protein (Greek yoghurt, protein powder, or milk), healthy fats (nut butter, seeds, avocado), and fibre (oats, berries, spinach). Avoid adding extra sugar or high-calorie syrups. Keep portions controlled — a typical weight-loss-friendly smoothie is 200–300 kcal. Protein helps you feel full longer.
How do Mounjaro and Wegovy help with weight loss?
Both are GLP-1 receptor agonists (Mounjaro is also a GIP agonist). They work by signalling to your brain that you're full, reducing appetite and food cravings, and slowing how quickly food leaves your stomach. Clinical trials showed participants lost an average of 15–21% of their body weight — individual results vary significantly.
How do I access prescription weight loss medication in the UK?
You can get a referral from your GP to NHS specialist weight management services, or access medication privately through a GPhC-registered online pharmacy following a clinical assessment. Both require a consultation to check eligibility based on BMI and health history. Ask your GP about availability in your area.
Can I combine breakfast smoothies with prescription weight loss medication?
Yes, prescription medications like Mounjaro and Wegovy are always used alongside dietary changes (like healthy breakfasts) and increased physical activity — not instead of them. Healthy smoothies fit well into a weight management plan. A prescriber or dietitian can advise on nutrition alongside medication.
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.