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
Free tracker included with every download this week
Protein Smoothies For Weight Loss
Protein smoothies can be a useful addition to a weight loss plan when made with the right ingredients, as they help you feel fuller for longer and preserve muscle during weight loss. However, smoothies alone won't lead to sustainable weight loss — they work best alongside a calorie deficit, regular physical activity, and healthy eating habits. For adults in the UK with a BMI of 30 or above, or 27–29.9 with weight-related health conditions, prescription weight management options are also available through the NHS or privately.
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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.
How Protein Smoothies Support Weight Loss
Protein is essential for weight loss because it increases satiety — helping you feel fuller for longer and reducing overall calorie intake. High-protein smoothies typically contain 20–40g of protein per serving, which can delay hunger and support muscle maintenance during a calorie deficit.
- Satiety: Protein takes longer to digest than carbohydrates, keeping you satisfied between meals
- Muscle preservation: When losing weight, adequate protein helps protect lean muscle mass
- Metabolism: Protein has a higher thermic effect, meaning your body uses more energy to digest it
Effective weight loss also requires a sustained calorie deficit of around 500 kcal per day for approximately 0.5 kg weekly loss. Protein smoothies fit into this when they replace higher-calorie alternatives or snacks. Our free BMI calculator can help you understand your personal weight status, and our weight converter tool shows your current weight in both metric and imperial measurements.
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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.
Prescription Weight Management in the UK
For many adults, lifestyle changes like improved diet and exercise are the foundation of weight loss. However, prescription medications are available for eligible UK adults alongside these changes. GLP-1 medications such as Mounjaro (tirzepatide) and Wegovy (semaglutide) are licensed in the UK for weight management and may help reduce appetite and food cravings.
- You may be eligible if your BMI is 30 or above, or 27–29.9 with weight-related health conditions like type 2 diabetes or high blood pressure
- NHS access is through specialist tier 3 weight management services; private options are also available
- These medications work best alongside dietary changes and increased physical activity
Your GP can assess whether prescription weight management is right for you. Use our GLP-1 weight loss calculator to estimate potential outcomes if you're eligible for treatment.
- 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 protein smoothies alone help me lose weight?
Protein smoothies support weight loss as part of a calorie deficit, but they're not a standalone solution. You'll also need to reduce overall calorie intake, eat balanced meals, stay physically active, and make sustainable lifestyle changes. Think of smoothies as a helpful tool, not the complete answer.
What ingredients should I include in a weight loss protein smoothie?
Use Greek yoghurt or protein powder (20–30g protein), unsweetened almond milk, frozen berries, and leafy greens like spinach. Avoid added sugars, honey, and high-calorie nut butters in large amounts. Aim for smoothies under 300 kcal to fit into a weight loss plan.
How often should I drink protein smoothies for weight loss?
1–2 per day is typical, depending on your calorie targets. A morning smoothie can replace breakfast; an afternoon one can replace a snack. Use our free progress tracker to log your intake and monitor how smoothies fit into your overall diet and weight loss journey.
Are prescription weight loss medications like Mounjaro or Wegovy better than protein smoothies?
They work differently. Protein smoothies support weight loss through nutrition; prescription medications reduce appetite via GLP-1 pathways. Many UK adults use both together — smoothies for nutrition and medication for appetite control. Your GP can advise what's appropriate for your situation.
How do I know if I'm eligible for weight loss medication in the UK?
You may be eligible if your BMI is 30 or above, or 27–29.9 with weight-related health conditions. The NHS offers specialist weight management services; private prescribing is also available. Contact your GP to discuss whether prescription weight management is suitable for you.
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.