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
Jogging and Weight Loss in the UK
Jogging is an effective cardiovascular exercise that supports weight loss when combined with a reduced-calorie diet. However, exercise alone may not be sufficient for significant weight management, which is why many UK adults explore additional options including prescription medication. If you're carrying excess weight, understanding how jogging fits alongside clinical weight loss support can help you achieve sustainable results. Our free BMI calculator can help you understand your current weight status and whether prescription weight management options might be suitable for you.
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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.
UK-Licensed Weight Loss Medications
For adults struggling with weight management despite exercise and dietary changes, prescription weight loss medications are now available in the UK. Three main options are licensed for weight management: Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide). These are GLP-1 and GIP receptor agonist medications that reduce appetite and support feeling fuller after smaller meals.
You may be eligible if you have a BMI of 30 kg/m² or above, or 27–29.9 kg/m² with weight-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnoea. In clinical trials, these medications achieved average weight losses of 15–21% of body weight when combined with exercise and dietary changes. Access to prescription weight loss is available through both NHS specialist services and private online prescribing, though availability varies by region.
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 in the UK
NHS access requires referral to a tier 3 specialist weight management service through your GP. Waiting times can be lengthy in many areas, and eligibility varies by region. Private access is available through GPhC-registered online pharmacies following a clinical assessment with a UK-licensed prescriber.
Before pursuing prescription medication, speak with your GP about your weight loss goals and exercise routine. Our GLP-1 weight loss calculator can help you estimate potential outcomes at different medication doses. Your GP can assess whether you're eligible and whether medication would be appropriate alongside your jogging routine. Remember, prescription medications work best when combined with regular physical activity and a balanced diet—jogging remains an important part of a comprehensive weight management approach.
- 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 jogging alone help me lose weight without medication?
Jogging supports weight loss when combined with a calorie deficit and balanced nutrition. However, many people find that exercise alone produces slower results. If you have significant excess weight, adding prescription medication alongside your jogging routine may help you achieve faster, more sustainable weight loss. Speak to your GP about what approach suits your situation.
What's the difference between Mounjaro and Wegovy for weight loss?
Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist, while Wegovy (semaglutide) is a GLP-1 agonist only. In clinical trials, Mounjaro achieved slightly higher average weight loss (around 20.9% of body weight) compared to Wegovy (around 14.9%), though individual results vary significantly. Both are prescription-only and require clinical assessment.
Am I eligible for prescription weight loss medication on the NHS?
You may be eligible if you have a BMI of 30 or above, or 27–29.9 with weight-related health conditions. However, NHS availability varies by region and waiting times can be long. Your GP can refer you to a specialist weight management service for assessment. Use our free BMI calculator to check your current BMI status.
How do weight loss injections work alongside exercise like jogging?
Weight loss medications reduce appetite and help you feel fuller after smaller meals, making it easier to maintain a calorie deficit. Jogging burns calories and improves cardiovascular fitness. Together, they support sustainable weight loss. Most people taking these medications are advised to continue regular physical activity for best results.
How long does it take to see weight loss results with medication?
Most people begin to see noticeable weight loss within 4–8 weeks of starting medication. However, results vary based on dose, diet, exercise, and individual factors. Our progress tracker can help you log weight changes over time. Speak to your prescriber about realistic timelines for your individual situation.
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.