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 Injections in Hull — UK Prescription Options
Weight loss injections are prescription-only medications that can help eligible adults manage their weight in the UK. If you're based in Hull or anywhere in the country, you may be able to access these medications through the NHS or private prescribing. This guide explains what weight loss injections are available, who is eligible, and how to find out if prescription weight management is suitable for you. Understanding your options—and your BMI—is the first step towards choosing the right approach for your health.
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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 Injections and Eligibility
Three prescription weight loss injections are currently licensed in the UK:
- Mounjaro (tirzepatide) — a once-weekly dual GIP and GLP-1 receptor agonist. Clinical trials showed average weight loss of 15–21% of body weight. Maximum dose is 15 mg per week.
- Wegovy (semaglutide) — a once-weekly GLP-1 receptor agonist. Clinical trials demonstrated average weight loss of around 15% of body weight. Maximum dose is 2.4 mg per week.
- Saxenda (liraglutide) — a once-daily GLP-1 receptor agonist. Dose range 0.6–3 mg daily.
To be eligible for prescription weight loss treatment in the UK, you typically need a BMI of 30 or above, or a BMI of 27 or above with weight-related health conditions (such as type 2 diabetes, high blood pressure, or sleep apnoea). Lower thresholds apply if you're of South Asian, Chinese, Black African, or Black Caribbean heritage. All these medications require a prescription and clinical assessment before being dispensed.
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: You can ask your GP about weight loss medication. If eligible, you'll typically be referred to a specialist tier 3 weight management service in your local area. NHS availability and waiting times vary significantly by region. Some areas have shorter waiting lists than others.
Private access: You can access weight loss injections through a private online consultation with a UK-licensed prescriber, followed by dispensing from a GPhC-registered pharmacy. This route doesn't require an NHS referral and can be faster, though there is a cost.
Whichever route you choose, a qualified prescriber will assess your individual health to determine which medication—if any—is appropriate for you. Weight loss injections work best alongside a reduced-calorie diet and increased physical activity. Use our free GLP-1 weight loss calculator to explore potential outcomes, and our BMI calculator to check where you currently stand against NHS weight thresholds.
- 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.
What is the difference between Mounjaro and Wegovy?
Both are once-weekly injections for weight management, but Mounjaro is a dual GIP and GLP-1 receptor agonist, while Wegovy is a GLP-1 agonist only. Mounjaro showed slightly higher average weight loss in clinical trials (15–21% vs 15%), but individual results vary. A prescriber will assess which is more suitable for you based on your health profile.
Am I eligible for weight loss injections on the NHS in Hull?
You may be eligible if you have a BMI of 30 or above, or 27 or above with weight-related health conditions. Speak to your GP about referral to your local specialist weight management service. NHS eligibility is assessed individually. Waiting times vary by region, so contact your GP practice for local information.
How quickly do weight loss injections work?
Weight loss typically begins within a few weeks, with most significant loss occurring between weeks 12 and 68 of treatment. However, individual results vary considerably. Dosing is gradual—you start on a low dose and increase every 4 weeks. Sustainable weight loss alongside lifestyle changes produces the best long-term outcomes.
What are the most common side effects of weight loss injections?
The most common side effects are gastrointestinal: nausea, diarrhoea, vomiting, and constipation. These tend to improve over time as your body adjusts. Less common side effects include headache, fatigue, and injection site reactions. Always discuss potential side effects with your prescriber before starting.
Can I get weight loss injections privately in Hull if I'm not eligible for NHS treatment?
Yes. Private prescribers can assess you independently and prescribe weight loss injections if clinically appropriate, regardless of NHS eligibility criteria. Private prescriptions are dispensed by registered pharmacies. Costs vary by dose and provider but typically range from £129–£320 per month.
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.