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
Almonds and Weight Loss — What UK Research Shows
Almonds are nutrient-dense and may support weight loss when eaten in moderation as part of a balanced diet, thanks to their protein, fibre, and healthy fat content. However, while almonds can be a helpful addition to your weight management journey, they work best alongside broader lifestyle changes. For many UK adults looking to lose weight, a combination of dietary improvements, physical activity, and — where eligible — prescription weight loss medication offers more significant results. Understanding all available options helps you choose the right approach for your individual health needs.
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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
If you're looking for weight management uk support beyond diet alone, three prescription medications are currently licensed in the UK: Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide). These are GLP-1 receptor agonist medications that help reduce appetite and support feeling fuller after smaller meals. Clinical evidence shows these medications can support significant weight loss when used alongside a reduced-calorie diet and physical activity.
- Mounjaro — once-weekly injection, average weight loss around 15–21% of body weight in clinical trials
- Wegovy — once-weekly injection, average weight loss around 15% of body weight in trials
- Saxenda — daily injection, approved for nhs weight loss management
To be eligible for prescription weight loss medication in the UK, you typically need a BMI of 30 or above, or 27 or above with weight-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnoea. Use our free BMI calculator to check where you currently stand — this gives you a baseline for conversations with your GP.
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.
NHS vs Private Access — How to Get Started
NHS access: Referral to a specialist tier 3 weight management service through your GP is the standard route. Waiting lists vary significantly by region, and availability depends on your local Integrated Care Board (ICB). Private access: You can access prescription weight loss medication through GPhC-registered online prescribers following a clinical assessment, without an NHS referral. Your GP can advise you on eligibility and help you explore both options. Even if you're interested in medication, a GP consultation is essential — they'll assess your individual health, any contraindications, and whether glp-1 weight loss medication or other interventions suit you best. Our free GLP-1 weight loss calculator can help you understand projected outcomes at different doses, but personalised medical advice from your GP remains the foundation of any weight loss plan.
- 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.
Do almonds alone help you lose weight?
Almonds can be part of a weight loss diet due to their protein and fibre content, but weight loss requires an overall calorie deficit. They're best used as part of a balanced eating plan rather than a standalone solution. Combining dietary changes, physical activity, and — if eligible — prescription medication tends to deliver better results for significant weight loss.
What's the difference between Mounjaro and Wegovy for weight loss?
Both are once-weekly injections licensed for weight management in the UK. Mounjaro is a dual GIP and GLP-1 receptor agonist, while Wegovy is a GLP-1 agonist only. Mounjaro users lost an average of 15–21% of body weight in trials, compared to around 15% for Wegovy. Individual results vary, and your GP can advise which is more suitable for you.
Can I get weight loss injections through the NHS in the UK?
Yes, prescription weight loss medications including Mounjaro and Wegovy are available through NHS specialist weight management services. You'll need a GP referral to your local tier 3 service. Waiting times vary considerably by region. Private access is also available through online prescribers without an NHS referral, though this involves a cost.
How do I know if I'm eligible for prescription weight loss medication?
Eligibility typically requires a BMI of 30 or above, or 27 or above with a weight-related health condition like diabetes or high blood pressure. Use the free BMI calculator on this page to check your BMI, then discuss your eligibility with your GP. They'll assess your individual circumstances and advise on the best options for you.
Should I use almonds if I'm taking weight loss medication?
Yes, almonds can be part of a healthy diet while on weight loss medication like Mounjaro or Wegovy. However, portion control matters — a small handful (about 23 almonds) is a reasonable serving. Your prescriber or a dietitian can give personalised advice on nutrition alongside medication. Track your progress using our free progress tracker alongside any dietary changes.
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.