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
Are Groundnuts Good For Weight Loss?
Groundnuts (peanuts) can be part of a healthy diet for weight management when eaten in controlled portions, as they're high in protein and fibre. However, they're calorie-dense at around 567 kcal per 100g, so moderation is essential. For many UK adults looking to lose weight, dietary changes alone may not be enough. If you have a BMI of 30 or above, or 27–29.9 with weight-related health conditions, prescription weight loss medication might be an option worth discussing with your GP. This guide explores both nutritional approaches and UK-licensed medication options available through the NHS or private prescribing.
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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.
Prescription Weight Loss Options Available in the UK
Three prescription medications are currently licensed in the UK for weight management:
- Mounjaro (tirzepatide) — a dual GIP and GLP-1 receptor agonist injected once weekly. Clinical trials showed participants lost an average of 15–21% of their body weight alongside dietary changes.
- Wegovy (semaglutide) — a GLP-1 receptor agonist injected once weekly. Average weight loss in trials was approximately 15% of body weight at the maximum dose.
- Saxenda (liraglutide) — a GLP-1 receptor agonist given as a daily injection, with slightly lower average weight loss outcomes.
All three are prescription-only medicines requiring a clinical assessment before prescribing. They work best when combined with dietary changes (like including nutrient-dense foods such as groundnuts in measured amounts) and increased physical activity. Individual results vary significantly. Use our GLP-1 weight loss calculator to explore potential outcomes at different doses.
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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.
NHS vs Private Access — How to Get Started
NHS route: Ask your GP for a referral to your local tier 3 specialist weight management service. Eligibility is assessed based on your BMI and health conditions. Availability and waiting times vary significantly by region.
Private route: You can access prescription weight loss medication through GPhC-registered online prescribers without an NHS referral. A licensed prescriber will assess your suitability via online consultation. To find out whether you're eligible, calculate your BMI using our free BMI calculator above. Once you know your BMI, you can have a meaningful conversation with your GP or a private prescriber about whether medication is appropriate for your individual 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.
Are groundnuts calorie-dense for weight loss?
Yes. Groundnuts contain around 567 kcal per 100g, making them calorie-dense. However, they're also high in protein and fibre, which support satiety. A small handful (approximately 30g) can be included in a calorie-controlled diet, but portion control is essential for weight loss success.
Should I only eat groundnuts if I want to lose weight?
No. Weight loss requires a sustained calorie deficit, which typically involves multiple dietary changes plus increased physical activity. Groundnuts can be part of a healthy balanced diet but shouldn't be relied upon as a primary weight loss tool. Track your progress using our free progress tracker to monitor your overall weight management journey.
What is the NHS approach to weight loss?
The NHS recommends a structured approach: start with dietary changes and physical activity (tier 1), then community programmes (tier 2). If these aren't sufficient and your BMI qualifies you (30 or above, or 27–29.9 with comorbidities), your GP can refer you to specialist tier 3 services where prescription medication may be considered.
How quickly can I expect weight loss with prescription medication?
With Mounjaro or Wegovy, weight loss typically becomes noticeable within 4–8 weeks, with average weight loss of 0.5–1kg per week when combined with calorie reduction. However, individual responses vary significantly. Doses are increased gradually every 4 weeks, and maximum effects are usually seen after 4–6 months of treatment.
Can I combine groundnuts with GLP-1 medication for weight loss?
Yes. GLP-1 medications work alongside dietary changes, not instead of them. Groundnuts can fit into your diet when portion-controlled. Many people find that GLP-1 medication helps reduce overall appetite and cravings, making it easier to stick to a balanced diet that includes nutrient-dense foods. Your prescriber can advise on dietary planning alongside medication.
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.