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
Can Spinach Fruit Smoothies Help With Weight Loss?
Spinach fruit smoothies can be part of a healthy weight management strategy, but they're not a weight loss solution on their own. Adding nutrient-dense ingredients like spinach, berries, and protein to your diet supports overall health and helps you feel fuller for longer. However, sustainable weight loss requires a calorie deficit, regular physical activity, and consistent lifestyle changes. If you're interested in weight management options alongside diet and exercise, our free weight loss calculator can help you explore different approaches and understand what realistic results might look like for you.
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.
How Smoothies Support Weight Loss
Spinach and other leafy greens are low in calories but high in fibre, vitamins, and minerals—making them excellent smoothie additions for weight management in the UK. Fibre helps you feel fuller longer, which naturally reduces overall calorie intake. Fruit adds natural sugars and additional nutrients, though portion control matters for calorie balance.
- Spinach adds bulk without many calories (7 kcal per 100g raw)
- Berries provide fibre, antioxidants, and satiety support
- Protein powder or Greek yoghurt increases protein content and keeps you satisfied longer
- A balanced smoothie (300–400 kcal) can replace a higher-calorie snack or light meal
To achieve weight loss, you need a calorie deficit—typically around 500 kcal per day for sustainable loss of approximately 0.5 kg per week, according to NHS guidance. Smoothies can help create this deficit if they replace less nutritious options, but they cannot compensate for overeating elsewhere.
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.
Weight Loss Beyond Smoothies — What Really Works
While healthy eating is essential, sustainable weight loss requires consistent calorie deficit, physical activity, and behaviour change. The NHS recommends a balanced approach: reduced-calorie diet, regular exercise, and behaviour support. For some people, prescription weight loss medication alongside lifestyle changes may be appropriate—options include GLP-1 medications like Mounjaro or Wegovy, available through NHS specialist services or private assessment. Use our free BMI calculator to assess your current health status, and speak with your GP about personalised weight loss strategies that suit your circumstances.
- 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.
Will a spinach smoothie alone help me lose weight?
No. A smoothie is one food component, not a weight loss method. Weight loss requires a consistent calorie deficit across your whole diet, plus regular physical activity. Smoothies can support this if they're part of a calorie-controlled plan, but they cannot create weight loss by themselves.
How many calories should a weight loss smoothie have?
A smoothie should fit within your daily calorie target. For most people aiming to lose weight, a 300–400 kcal smoothie can serve as a meal replacement or snack. However, total daily intake matters more than any single food. Use NHS guidance: aim for a 500 kcal daily deficit for approximately 0.5 kg weekly loss.
What ingredients make a smoothie better for weight loss?
Include leafy greens (spinach, kale), protein (Greek yoghurt, protein powder), fibre-rich fruit (berries, apple), and avoid added sugars and full-fat dairy. These ingredients increase satiety and provide nutrition without excess calories. Measure portions carefully—fruit is healthy but calorie-dense.
Can smoothies replace proper weight loss treatment?
No. Dietary changes alone help some people, but many benefit from structured support. If you have a BMI over 30, or 27+ with weight-related health conditions, your GP can discuss options including NHS weight management services or prescription medications alongside lifestyle changes.
What if smoothies aren't working for my weight loss?
If you've maintained a calorie deficit with smoothies and exercise for 8–12 weeks without results, speak to your GP. Other factors—medical conditions, medications, metabolism—may be involved. Your GP can refer you to specialist weight management services, where further support and treatment options may be appropriate.
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.