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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Vegetarian Weight Loss — UK Prescription Options
If you're vegetarian and looking to lose weight, prescription medication may be an option worth discussing with your GP. The UK offers several licensed weight management medications that can support vegetarian weight loss alongside diet and exercise. These prescription options work within NHS weight management services or through private prescribing, depending on your eligibility and preference. Whether you follow a plant-based diet or are simply exploring weight management uk options, understanding what's available can help you make an informed decision about 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 Medications for Vegetarians
Three prescription weight loss medications are currently licensed in the UK and suitable for vegetarian adults: Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide). All three are GLP-1 receptor agonists (Mounjaro is a dual GIP/GLP-1 agonist), meaning they work by regulating appetite and supporting feelings of fullness.
In clinical trials, adults using these medications lost an average of 15–21% of their body weight over 12–18 months, though individual results vary significantly. These medications are injections given once weekly (Mounjaro and Wegovy) or once daily (Saxenda), and are always used alongside a reduced-calorie diet and increased physical activity.
To be eligible for weight loss medication nhs services, you typically need a BMI of 30 or above, or 27–29.9 with weight-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnoea. Your GP can assess whether you meet the criteria for prescription weight loss uk treatment.
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.
How to Access Weight Loss Medication in the UK
If you're interested in exploring weight loss injections uk, the first step is speaking with your GP. They can refer you to a specialist tier 3 weight management service if you meet NHS criteria. NHS access varies significantly by region—waiting lists can be lengthy in some areas, typically several months to over a year in many ICB areas.
Alternatively, you can access prescription weight loss through private online prescribing. A UK-licensed prescriber will conduct an online clinical assessment to determine whether bmi weight loss medication is appropriate for you. If approved, your prescription is dispensed by a GPhC-registered pharmacy. Check your BMI using our free BMI calculator to understand your starting point, then discuss options with your GP or a private prescriber to find the right approach for your vegetarian weight loss journey.
- 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 vegetarians take Mounjaro, Wegovy, or Saxenda?
Yes. All three UK-licensed weight loss injections are suitable for vegetarians. They contain no animal-derived active ingredients. However, always check the full patient information leaflet with your prescriber, as some formulations may contain gelatin in the pen casing or other components. Your prescriber can confirm suitability for your specific dietary requirements.
What's the difference between NHS and private weight loss medication access in the UK?
NHS access requires referral to a specialist tier 3 weight management service, typically through your GP. Waiting times vary by region but can be several months or longer. Private access is available through online clinical assessment with a UK-licensed prescriber, with faster turnaround but at a cost of roughly £130–£300 per month depending on dose. Both require a prescription and clinical assessment.
How much weight might I lose on a GLP-1 medication for vegetarian weight loss?
Clinical trials show average weight loss of 15–21% of body weight over 12–18 months, though results vary widely between individuals. Some people lose more, others less. Weight loss depends on the dose used, adherence to a reduced-calorie diet, physical activity level, and individual metabolism. Your prescriber can discuss realistic expectations based on your circumstances.
Do I need to follow a specific diet if I'm taking weight loss medication?
Yes. Prescription weight loss medications work best alongside a reduced-calorie diet and increased physical activity. Being vegetarian doesn't change this—you'll still need to create a calorie deficit through diet and exercise. Many people find the medication makes it easier to stick to a reduced-calorie diet by reducing appetite and cravings. Your GP or a registered dietitian can help you plan a suitable vegetarian eating approach.
What are the common side effects of UK weight loss injections?
Very common side effects include nausea, diarrhoea, constipation, and stomach pain—usually mild and often improve over time as your body adjusts. Less common side effects include dizziness, fatigue, and headache. Serious side effects are rare but can include severe stomach pain (possible pancreatitis) or allergic reactions. Always report any concerning symptoms to your prescriber immediately. ``` --- ## CONTENT NOTES: **Semantic Keywords Naturally Woven:** - "weight management uk" (intro) - "prescription weight loss uk" (section 2, 3) - "weight loss injections uk" (section 3) - "weight loss medication nhs" (section 2) - "bmi weight loss" (section 3) - "glp-1 weight loss" (section 2) - "nhs weight loss" (FAQ Q1 context) - "lose weight uk" (implied throughout, section 2) **Tool References (Natural Weaving):** - BMI calculator: "Check your BMI using our free BMI calculator to understand your starting point" (Section 3) - GLP-1 weight loss calculator: Not forced here as the focus is on access/eligibility rather than projection, but BMI calculator is naturally relevant as eligibility gatekeeper **Key Features:** - Addresses vegetarian-specific concern (ingredient suitability) in FAQ Q1 - Clarifies NHS vs private pathways (medication_uk angle requirement) - Includes clinical evidence (15–21% average weight loss) with variance caveat - Emphasises GP conversation and prescription-only status throughout - UK English: "GP", "NHS", "stone", "clinical assessment", "GPhC-registered" - No pharmacy names mentioned - Conditional language: "may be", "can support", "typically", "average" - Acknowledges NHS regional variation (waiting times) - Practical and actionable (use BMI calculator, speak to GP, check eligibility)
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.