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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Easy Fruit Smoothie Recipes for Weight Loss
Fruit smoothies can be a practical addition to weight loss plans when made thoughtfully — but many commercial versions are high in sugar and calories. This guide covers easy, lower-calorie smoothie recipes, nutritional strategies, and how smoothies fit into sustainable weight management. Whether you're managing weight through diet, exercise, or with prescription weight loss medication as part of your NHS weight loss journey, smoothies can support your goals when prepared correctly.
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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.
Low-Calorie Smoothie Recipes and Nutritional Tips
A successful weight loss smoothie balances protein, fibre, and healthy fats to keep you fuller for longer. Here are four easy recipes, each roughly 150–200 kcal:
- Berry and Protein: 150g mixed berries, 150ml unsweetened almond milk, 1 scoop vanilla protein powder, 1 tbsp ground flaxseed. Blend until smooth. High in antioxidants and protein.
- Green and Creamy: Handful of spinach, 1 medium banana, 150ml natural yoghurt, 100ml water. Simple, filling, naturally sweet.
- Apple and Cinnamon: 1 medium apple (cored), 150ml oat milk, ½ tsp cinnamon, handful of ice. Cinnamon may help regulate blood sugar.
- Tropical Light: 100g pineapple, 100g mango, 150ml coconut water, squeeze of lime juice. Refreshing and lower in added sugar than juice-based versions.
The key is avoiding sugary yoghurts, fruit juice, honey, and syrups — these add calories without the satiety benefit of whole fruit or protein.
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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.
Making Smoothies Part of Your Weight Management Strategy
Smoothies work best as a meal replacement or planned snack, not as an additional drink on top of your normal diet. A 150–200 kcal smoothie can replace a light breakfast or afternoon snack, supporting the calorie deficit needed for weight loss — typically around 500 kcal per day for sustainable 0.5kg weekly loss. If you're using prescription weight loss medication like GLP-1 injections, smoothies can be easier to consume when appetite is reduced.
Use our free GLP-1 weight loss calculator to see how medication might support your overall goals, and track your progress with our free progress tracker. Always combine smoothies with a balanced diet and increased physical activity for best results. Your GP can provide personalised advice about your weight management approach.
- 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.
Are fruit smoothies good for weight loss?
Fruit smoothies can support weight loss when they're lower in calories and sugar, contain protein and fibre, and replace a meal rather than add extra calories. Commercial smoothies are often high in sugar and calories, so homemade versions give you control. They work best alongside a calorie deficit and increased activity.
How many calories should a weight loss smoothie have?
Aim for 150–250 kcal per smoothie if it's replacing a light meal or snack. This fits comfortably into a reduced-calorie diet. Avoid smoothies over 300 kcal unless they're your main meal, as they often don't provide the same satiety as whole foods.
What ingredients make a smoothie more filling?
Add protein (Greek yoghurt, protein powder, or nut butter), fibre (berries, spinach, oats, or ground flaxseed), and healthy fats (small amount of almond butter or chia seeds). These slow digestion and help you feel fuller for longer.
Can I drink smoothies if I'm on weight loss medication?
Yes. Smoothies can be helpful if appetite is reduced. They're nutrient-dense and easier to consume than solid food. However, always follow your prescriber's guidance, and remember that medication works best alongside a balanced diet and activity.
Should I use fruit juice in my smoothie?
No. Fruit juice adds sugar without fibre and increases calories significantly. Use whole fruit, unsweetened milk alternatives, or water instead. This keeps sugar lower and the smoothie more filling without compromising nutrition.
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.