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 Powder Smoothies For Weight Loss
High-protein smoothies are a practical tool for sustainable weight management in the UK. Protein powder helps you feel fuller for longer, supports muscle maintenance during weight loss, and makes it easy to create satisfying meals. This guide covers evidence-based smoothie recipes and how protein fits into a calorie-controlled diet for weight loss. Remember, sustainable weight loss typically works best alongside dietary changes and increased physical activity — whether you're managing weight through lifestyle changes alone or alongside prescription weight loss medication prescribed by your GP.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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.
Why Protein Matters For Weight Loss
Protein is essential for weight loss because it increases satiety (how full you feel), reduces hunger hormones, and helps preserve muscle mass while losing fat. The NHS recommends adults aim for adequate protein intake as part of a balanced diet.
When combined with a calorie deficit of around 500 kcal per day, protein-rich smoothies can support a steady weight loss of approximately 0.5 kg per week — the NHS-recommended safe rate. Protein also has a higher thermic effect than carbohydrates or fat, meaning your body burns more calories digesting it.
- Typical protein smoothie: 25–35g protein, 250–350 kcal — suitable as a meal replacement or snack
- Best timing: breakfast or post-workout to maximise satiety and muscle support
- Protein powder types: whey (complete amino acids), plant-based (pea, hemp, soya), or casein (slower-digesting)
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.
Simple High-Protein Smoothie Recipes
Recipe 1: Berry Protein Smoothie — 30g protein powder, 150g frozen berries, 200ml unsweetened almond milk, 1 tbsp natural almond butter, handful of spinach. Blend until smooth. Approximately 280 kcal, 30g protein.
Recipe 2: Chocolate Banana Smoothie — 25g chocolate protein powder, 1 medium banana, 200ml skimmed milk, 1 tsp peanut butter, 1 ice cube. Blend thoroughly. Approximately 310 kcal, 28g protein.
Recipe 3: Tropical Green Smoothie — 30g vanilla protein powder, 100g frozen mango, 100g pineapple, 200ml coconut water, 2 handfuls spinach. Blend well. Approximately 250 kcal, 30g protein. Track your smoothie consumption using our free progress tracker to monitor your weight loss journey over time.
- 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 are helpful for weight management when used as part of a calorie-controlled diet. They support satiety and muscle preservation, but weight loss ultimately depends on achieving a consistent calorie deficit alongside increased physical activity. Your GP can discuss personalised dietary strategies with you.
How many protein smoothies should I drink per day?
Most people benefit from one protein smoothie as a meal replacement or snack, alongside regular meals. Drinking multiple smoothies daily could result in excessive calorie intake. Individual needs vary — your GP or a registered dietitian can advise on your personal requirements.
What's the best protein powder for weight loss?
Choose a protein powder with minimal added sugars and few additives. Whey, plant-based (pea, hemp, soya), and casein are all effective. The best choice depends on your dietary preferences, any intolerances, and whether you need a complete amino acid profile. Check the nutrition label carefully.
Do protein smoothies work with weight loss medication like Wegovy?
Yes — if you're prescribed weight loss medication like Wegovy (semaglutide), a GLP-1 injection approved by the NHS for weight management, protein smoothies can complement your treatment. They support nutrition intake during reduced appetite and help preserve muscle. Always discuss dietary choices with your prescriber.
How do I calculate calories in homemade smoothies?
Use an online nutrition tracker (free tools available) or check packaging labels for grams per serving. Total calories = protein powder calories + milk/liquid + fruit + add-ins. Our BMI calculator can help you establish your overall calorie targets for sustainable weight loss at your height and current weight.
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.