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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Halal Weight Loss Meal Delivery and Prescription Weight Loss in the UK
If you're looking for halal weight loss meal delivery in the UK, you may also want to explore prescription weight management options available to eligible adults. Combining structured nutrition with medical support can enhance results. This guide explains UK-licensed weight loss medications, eligibility criteria, and how to access them through the NHS or private prescribing. Whether you're using meal delivery services or managing weight management UK through other means, understanding your medication options is an important part of your health journey.
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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 Prescription Weight Loss Medications — What's Available?
Three GLP-1 and GIP/GLP-1 receptor agonist medications are currently licensed in the UK for weight management: Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide). Mounjaro is a once-weekly injection working through dual GIP and GLP-1 pathways. Clinical trials showed Mounjaro helped participants lose an average of 15–21% of their body weight over 72 weeks alongside reduced-calorie diet and increased physical activity. Wegovy is a once-weekly GLP-1 injection; STEP trial data showed approximately 15% average weight loss at the maximum dose. Saxenda is a daily injection option.
- Eligibility: Adults with a BMI of 30 or above, or BMI of 27–29.9 with weight-related conditions such as type 2 diabetes, high blood pressure, or sleep apnoea
- Ethnicities: South Asian, Chinese, Black African, and Black Caribbean adults may be eligible at lower BMI thresholds (from BMI 27.5)
- All three are prescription-only — you cannot buy them without a clinical assessment from a UK-licensed prescriber
Individual results vary considerably. Use our GLP-1 weight loss calculator to see estimated projections at different doses based on your personal health profile.
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
You can access prescription weight loss medication through two routes in the UK. NHS access: Referral from your GP to a tier 3 specialist weight management service. NICE has approved tirzepatide (Mounjaro) for NHS use, but availability varies by region and waiting lists can be lengthy. Private access: Online consultation with a UK-licensed prescriber, prescription issued if clinically appropriate, dispensed by a GPhC-registered pharmacy — no NHS referral required.
Start by discussing glp-1 weight loss options with your GP. They can assess whether you're eligible, explore NHS specialist services in your area, or advise on private alternatives. If you're combining weight loss injections with halal meal delivery, your prescriber can help monitor progress alongside your dietary 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.
Do I need to stop halal meal delivery if I use weight loss medication?
No. In fact, prescription weight loss medications like Mounjaro and Wegovy are most effective when combined with structured nutrition and physical activity. You can continue halal meal delivery while using medication — just ensure your prescriber knows about all your dietary approaches so they can monitor your progress and adjust doses if needed.
What's the difference between Mounjaro and Wegovy for weight loss?
Both are once-weekly injections licensed for UK weight management. Mounjaro (tirzepatide) uses dual GIP and GLP-1 mechanisms and showed average weight loss of 15–21% in trials. Wegovy (semaglutide) uses GLP-1 only, with average weight loss around 15%. Individual results vary. Your prescriber will recommend the most appropriate option based on your health profile and medical history.
How long does it take to see results with weight loss medication?
Results typically appear over weeks and months, not days. Most people notice reduced appetite within the first 1–2 weeks. Measurable weight loss usually begins by weeks 4–8. Maximum effect is typically reached at the highest tolerated dose, which can take 16–20 weeks to reach. Consistency with medication, diet, and exercise matters significantly.
Can I get weight loss injections on the NHS if I have a BMI of 28?
Possibly, if you have weight-related health conditions. Standard NHS eligibility is BMI 30 or above, or BMI 27–29.9 with conditions like type 2 diabetes, hypertension, or sleep apnoea. If you're of South Asian, Chinese, Black African, or Black Caribbean heritage, lower thresholds apply. Discuss your specific circumstances with your GP to find out if you qualify for NHS tier 3 services.
How can I track my progress with weight loss medication?
Keep a record of your weight, measurements, and how you feel. Use our free progress tracker to log your weight changes over time. Check your BMI regularly using our BMI calculator. Many people also track changes in energy levels, clothing fit, and how medication side effects evolve. Your prescriber will monitor your progress at regular reviews — typically every 4 weeks when adjusting doses.
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.