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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Fat Burning Smoothies for Weight Loss
Smoothies can be a helpful addition to a weight loss plan, but the idea of "fat burning" smoothies is more nuanced than the name suggests. No smoothie actually burns fat on its own — rather, certain smoothie ingredients can support a calorie-controlled diet by increasing satiety, providing nutrient density, and helping you feel fuller for longer. Combined with a reduced-calorie diet and increased physical activity, smoothies may help with sustainable weight management. For some people, prescription weight loss medication alongside lifestyle changes can provide additional support when needed.
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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.
What Makes a Smoothie Supportive for Weight Loss?
A smoothie supports weight loss when it's lower in calories, high in protein and fibre, and doesn't add unnecessary sugar. Key ingredients include:
- Protein sources: Greek yoghurt, protein powder, or silken tofu help you feel full and preserve muscle during weight loss
- Fibre: Oats, chia seeds, flaxseed, and berries slow digestion and extend satiety
- Healthy fats: A small amount of almond butter, avocado, or coconut oil can add fullness without excess calories
- Vegetables: Spinach, kale, or cucumber add volume and nutrients with minimal calories
- Fruit: Use whole fruits sparingly; one banana or a handful of berries adds natural sweetness and fibre without added sugar
Most effective weight loss smoothies contain 200–300 kcal and at least 15g protein. Check nutrition labels on powders and add-ons, as they often contain hidden sugars that undermine weight loss. Use our free BMI calculator above to track whether your overall calorie intake supports your weight goals.
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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.
Smoothies Alone Won't Create Weight Loss
It's important to understand that smoothies don't independently burn fat or create weight loss. Weight loss requires a calorie deficit — consuming fewer calories than you burn. A smoothie is simply a vehicle for delivering nutrients within that deficit. If a smoothie replaces a 500 kcal breakfast with a 250 kcal option, the deficit matters, not the smoothie itself.
For sustainable weight management across the UK, the NHS recommends losing 0.5–1 kg per week through a combination of dietary changes and physical activity. If you're finding lifestyle changes alone challenging, your GP can discuss prescription weight loss options with you. Try our GLP-1 weight loss calculator to explore how medication might support your weight management journey alongside smoothies and healthy habits.
- 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.
Do fat burning smoothies actually burn fat?
No smoothie actively burns fat. The term refers to smoothies designed to support a calorie deficit by increasing fullness and reducing overall calorie intake. Weight loss happens when you consume fewer calories than you burn — a smoothie is just a tool to help manage that deficit sustainably.
What's the best smoothie recipe for weight loss?
A weight loss smoothie should contain 15–20g protein (Greek yoghurt, protein powder), 5–10g fibre (oats, chia seeds), one portion of fruit (berries or half a banana), a handful of spinach, and water or unsweetened almond milk. Aim for 200–300 kcal total. Avoid syrups, sugary juices, and high-calorie nut butters.
Can smoothies replace meals during weight loss?
Smoothies can replace a meal if they contain sufficient protein, fibre, and whole food ingredients — typically 350–400 kcal with 20g+ protein. However, whole foods like eggs, fish, and vegetables often provide better satiety. Use smoothies as one option, not the only option, for sustainable eating patterns.
Should I use protein powder in weight loss smoothies?
Protein powder can be helpful because protein increases fullness and helps preserve muscle during weight loss. Choose powder with minimal added sugar (under 2g per scoop) and no artificial sweeteners if possible. Whole protein sources like Greek yoghurt are equally valid alternatives.
When should I consider prescription weight loss support?
If you've made sustained dietary and activity changes without adequate progress, your GP can assess whether prescription weight loss medication is appropriate. GLP-1 medications like Wegovy are prescription-only and work alongside lifestyle changes — not instead of them — for adults with a BMI of 30 or above, or 27 and above with weight-related health conditions.
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.