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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Weight Loss Bike Riding With UK Prescription Medication
Cycling is an excellent form of physical activity for weight management, but for many people in the UK, combining bike riding with prescription weight loss medication can provide additional support. If you're struggling to lose weight through exercise and diet alone, and you have a BMI of 30 or above (or 27 or above with weight-related health conditions), you may be eligible for prescription medication. This guide explains the UK-licensed options available, how they work alongside physical activity like cycling, and how to find out if you're eligible. Use our free BMI calculator above to check your starting point.
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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
Three prescription medications are currently licensed in the UK for weight management: Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide). These are GLP-1 receptor agonist medications (Mounjaro is a dual GIP/GLP-1 agonist) that may help reduce appetite and support feeling fuller after smaller meals.
In clinical trials, these medications have shown meaningful results when combined with lifestyle changes including exercise and a reduced-calorie diet. For example, Mounjaro showed average weight loss of approximately 15–21% of body weight across clinical trials, while Wegovy demonstrated average weight loss of around 15% when combined with diet and physical activity. Individual results vary significantly, and weight loss medication works best as part of a comprehensive approach that includes activities like bike riding, healthy eating, and sustained behaviour change.
All three medications are prescription-only and require a clinical assessment before being prescribed. Your GP or a licensed prescriber will assess your individual health situation, eligibility, and suitability.
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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
In the UK, you can access prescription weight loss medication through two routes: NHS specialist services or private prescribing.
- NHS route: Referral to a tier 3 specialist weight management service from your GP. Availability and waiting times vary significantly by region, with some areas having substantial waiting lists.
- Private route: Online consultation with a UK-licensed prescriber followed by prescription dispensing through a GPhC-registered pharmacy. This is available without an NHS referral and typically has shorter timeframes.
Before starting any medication, discuss your weight management goals with your GP, including your interest in combining exercise like cycling with medical support. Your prescriber will assess whether medication is appropriate for you alongside your physical activity plan. Track your progress using our free progress tracker.
- 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 weight cycling without medication?
Yes, cycling is excellent exercise for weight loss and can absolutely contribute to sustainable weight management. However, some people find that combining regular cycling with other approaches—including dietary changes and, if eligible, prescription medication—gives better results. Your GP can advise on the best approach for your individual situation.
Who is eligible for weight loss medication in the UK?
Adults with a BMI of 30 or above, or a BMI of 27–29.9 with weight-related health conditions (such as type 2 diabetes, high blood pressure, or cardiovascular disease), may be eligible. Those of South Asian, Chinese, Black African, or Black Caribbean heritage may have lower eligibility thresholds. A prescriber will assess your individual circumstances.
How long does it take to see weight loss results with medication?
In clinical trials, participants typically began seeing weight loss within the first few weeks, with continued loss over several months. Results vary between individuals. Combining medication with regular physical activity like cycling and a reduced-calorie diet tends to produce better outcomes than medication alone.
What's the difference between Mounjaro and Wegovy?
Mounjaro (tirzepatide) is a dual GIP/GLP-1 receptor agonist, while Wegovy (semaglutide) is a GLP-1 agonist only. Both are once-weekly injections. Clinical trial data suggests Mounjaro may produce slightly greater average weight loss, but individual responses vary. Your prescriber will recommend the most suitable option for you.
Can I use weight loss medication while cycling regularly?
Yes, prescription weight loss medications are designed to work alongside lifestyle changes including regular physical activity. In fact, clinical trials showed best results when medication was combined with exercise and dietary changes. Always inform your prescriber about your activity level and exercise routine, and discuss any side effects that might affect your cycling.
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.