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
Is Banana Helpful For Weight Loss?
Bananas can be part of a weight loss plan, but they're not a clinically supported solution. A medium banana contains around 105 calories and 27 grams of carbohydrates, making them relatively moderate in calorie content. What matters most for weight management UK is your overall calorie intake and balanced nutrition. This guide explains how bananas fit into sustainable weight loss, and why successful weight management combines dietary choices with lifestyle changes. Track your progress using our free progress tracker to monitor what works for your goals.
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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.
Nutritional Profile and Weight Loss Potential
Medium banana (101g): 105 calories, 27g carbohydrates, 3g fibre, 1.3g protein, negligible fat.
- Fibre content: The 3g of dietary fibre supports digestive health and can help you feel fuller for longer, potentially reducing overall calorie intake
- Natural sugars: Bananas contain fructose and glucose, which provide quick energy but don't cause blood sugar spikes in most people
- Potassium: Essential mineral that supports heart health and muscle function during weight loss
- Low glycaemic index (GI): Bananas have a GI of around 51–60, meaning they release energy gradually and support stable blood sugar levels
Within a reduced-calorie diet, bananas can fit comfortably. The key is portion control and balancing them with protein and other nutrients. For NHS weight loss guidance, aim for a calorie deficit of around 500 kcal daily for sustainable 0.5kg weekly loss.
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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.
How Bananas Support Weight Loss Goals
Bananas offer practical benefits for weight management. The fibre and resistant starch in unripe bananas may support satiety, helping you eat less overall. They're also portable and affordable, making consistent healthy eating easier. However, they should be one part of a balanced approach alongside protein, vegetables, and whole grains—not a replacement for them.
For prescription weight loss options, GLP-1 weight loss medication may support your efforts alongside dietary changes. Our free GLP-1 weight loss calculator can help you understand how medication might fit into your overall weight management strategy. Remember, successful long-term weight loss combines nutritious food choices with increased physical activity and, where appropriate, professional support from your GP.
- 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.
How many calories are in a banana?
A medium banana (101g) contains approximately 105 calories. Smaller bananas have around 90 calories, larger ones around 120–135 calories. Calories increase slightly as bananas ripen because starches convert to sugars. Check the weight on your banana or use a kitchen scale for accuracy.
Can I eat bananas while trying to lose weight?
Yes, bananas can be part of a weight loss plan. The fibre content supports fullness, and they're nutrient-dense. The key is portion control—enjoy one banana as a snack alongside protein (yoghurt, nuts) rather than multiple bananas daily. They fit within most calorie-deficit diets for sustainable weight loss.
Are green or yellow bananas better for weight loss?
Green (unripe) bananas contain more resistant starch, which may improve satiety slightly. Yellow bananas are easier to digest and have slightly higher natural sugars. From a weight loss perspective, the difference is minimal—choose whichever you prefer and focus on overall calorie balance and nutrition.
Should I avoid bananas if I'm on weight loss medication?
No specific interaction exists between bananas and prescription weight loss medications like semaglutide (Wegovy) or tirzepatide (Mounjaro). Some people on GLP-1 medication experience reduced appetite, which naturally limits intake. Bananas remain a nutritious choice—discuss individual dietary concerns with your GP or prescriber.
What's the best way to include bananas in a weight management plan?
Pair one medium banana with protein—Greek yoghurt, nuts, or nut butter—to balance blood sugar and increase satiety. Avoid consuming multiple bananas daily, and use our free progress tracker to monitor your weight loss journey and see which foods support your goals best.
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.