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
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10 Lb Weight Loss: What to Expect and Your Options in the UK
A 10 lb (approximately 4.5 kg) weight loss represents a meaningful starting point for improving health outcomes. In the UK, adults looking to lose weight sustainably have several options available, including lifestyle changes and prescription weight management medication. This guide explores what a 10 lb weight loss means for your health, how prescription medications like GLP-1 injections work, and whether you might be eligible for NHS or private treatment. Individual results vary significantly, but even modest weight loss can improve blood pressure, blood sugar control, and joint health.
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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-only medications are licensed in the UK for weight management. Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist available as a once-weekly injection, with clinical trials showing average weight loss of 15–21% of body weight over 72 weeks. Wegovy (semaglutide) is a GLP-1 receptor agonist, also injected once weekly, with average weight loss of around 15% in clinical trials. Saxenda (liraglutide) is a daily GLP-1 injection with more modest average weight loss outcomes.
All three are prescription-only and require a clinical assessment before being prescribed. They work by helping reduce appetite, supporting feeling fuller after smaller meals, and slowing digestion. Use our GLP-1 weight loss calculator to estimate potential outcomes at different doses. These medications are typically used alongside a reduced-calorie diet and increased physical activity—not as a standalone treatment.
Eligibility in the UK requires a BMI of 30 or above, or 27–29.9 with weight-related health conditions such as type 2 diabetes, high blood pressure, or cardiovascular disease. Your GP or a licensed prescriber will assess whether prescription weight loss medication is appropriate for you.
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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 Access vs Private Prescription Options
In the UK, prescription weight loss medication is available through two routes. NHS access is through specialist tier 3 weight management services following a GP referral—though waiting lists vary significantly by region and availability can be limited. Private access is available through online consultations with UK-licensed prescribers and GPhC-registered pharmacies, without requiring NHS referral.
Before pursuing any weight loss medication, discuss your options with your GP. They can assess your individual health needs, discuss realistic expectations, and help determine whether prescription medication is right for you. Track your progress using our free progress tracker alongside any treatment you choose. A 10 lb loss at a sustainable rate of 0.5–1 kg per week typically takes 4–5 weeks to achieve.
Check your current BMI and healthy weight range using our free BMI calculator to understand where you are now and where you're aiming. This provides essential context for any weight loss goal.
- 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 I lose 10 pounds without prescription medication?
Yes. A 10 lb weight loss is achievable through calorie deficit alone—typically requiring approximately 500 kcal daily reduction for sustainable loss of 0.5–1 kg per week. The NHS recommends this approach as a first step. Combining dietary changes with increased physical activity is most effective. Prescription medications are available if lifestyle changes alone don't produce sufficient results.
Is 10 pounds a significant amount of weight to lose?
Yes. Even a 5–10% body weight reduction can meaningfully improve blood pressure, blood sugar control, joint stress, and cardiovascular health markers. For someone weighing 180 lbs, 10 lbs represents a 5.5% reduction—clinically significant. Individual health benefits depend on your starting weight, existing health conditions, and overall lifestyle changes.
How long does it take to lose 10 pounds safely?
The NHS recommends losing 0.5–1 kg (1–2 lbs) per week for sustainable weight loss. At this rate, 10 lbs typically takes 5–10 weeks to achieve. Faster loss is possible with prescription medication or medical supervision, but slower, consistent loss is associated with better long-term outcomes and preservation of muscle mass.
What health conditions might make me eligible for prescription weight loss treatment?
Weight-related conditions that may qualify you for prescription medication include type 2 diabetes or prediabetes, high blood pressure, abnormal blood fats, obstructive sleep apnoea, or history of cardiovascular disease. A BMI of 27–29.9 with one of these conditions, or BMI of 30 or above regardless of health conditions, may qualify you. Your GP can assess your eligibility.
How do GLP-1 injections help with weight loss?
GLP-1 receptor agonist medications mimic a natural gut hormone that signals fullness to the brain, reduces appetite, slows stomach emptying, and supports feeling satisfied with smaller portions. This helps create the calorie deficit needed for weight loss. They're most effective when combined with dietary changes and physical activity, and results vary between individuals based on genetics, lifestyle, and dose tolerance.
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.