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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Majaro in the UK: Complete Health Information Guide
Majaro is a prescription-only weight management injection licensed for use in the UK. This informational guide explains how Majaro works, who may be eligible, and the UK health pathway for accessing it. If you're exploring weight management options as part of your uk health guide, understanding prescription medications alongside lifestyle changes is important. Always consult your GP for nhs health advice personalised to your circumstances before starting any treatment.
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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.
How Majaro Works for Weight Management
Majaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist—this dual mechanism sets it apart from single-action weight management medications. It works by activating two natural hormone pathways that regulate appetite, reduce food cravings, and support feeling fuller after eating. The medication slows gastric emptying (how quickly food leaves the stomach), though this effect often reduces over time. Majaro also helps your body regulate fat utilisation and may improve how your body responds to food intake.
The injectable is administered once weekly using a pre-filled KwikPen device. Doses start at 2.5 mg and escalate gradually over weeks, with a maximum dose of 15 mg weekly. Clinical trials showed participants lost an average of 15–21% of their body weight—though individual results vary significantly. Weight loss is achieved when Majaro is used alongside a reduced-calorie diet and increased physical activity, not as a standalone 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.
UK Eligibility and NHS Access Pathway
In the UK, adults may be eligible for Majaro if they have a BMI of 30 kg/m² or above, or a BMI of 27–29.9 with weight-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnoea. For people of South Asian, Chinese, Black African, or Black Caribbean heritage, lower BMI thresholds apply—eligibility may start at BMI 27.5 or above due to higher health risks at lower weights.
Access through the NHS requires referral to a specialist tier 3 or tier 4 weight management service. Regional availability varies significantly—waiting lists can be lengthy in many areas. Private access is available through UK-licensed prescribers following an online clinical assessment, without requiring an NHS referral. Your GP can advise on nhs guidance specific to your area and help you explore healthy weight uk options suited to your health.
- 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.
Is Majaro available on the NHS in the UK?
Majaro (tirzepatide) is approved for NHS use within specialist weight management services. Access requires referral from your GP to a tier 3 or 4 service. Availability and waiting times vary significantly by region. Private prescribing is also available through UK-licensed prescribers following clinical assessment.
What is the difference between Majaro and Wegovy?
Majaro is a dual GIP+GLP-1 agonist, while Wegovy (semaglutide) is a GLP-1 agonist only. Majaro starts at 2.5 mg and reaches 15 mg maximum; Wegovy starts at 0.25 mg and reaches 2.4 mg. Clinical trial results show similar average weight loss (around 15–21%), though individual outcomes vary. Consult a prescriber about which may suit you.
What are the common side effects of Majaro?
Very common side effects include nausea, diarrhoea, vomiting, constipation, and stomach pain—these often improve over time. Common effects include indigestion, acid reflux, injection site reactions, fatigue, and dizziness. Seek urgent medical attention for severe stomach pain (possible pancreatitis) or serious allergic reactions.
How quickly will I lose weight on Majaro?
Weight loss varies individually and depends on your starting weight, diet adherence, and activity level. Clinical trials showed average losses of 15–21% body weight over 72 weeks. The NHS recommends losing 0.5–1 kg per week for sustainable results. Use our free bmi calculator and weight loss calculator to track your progress.
Can I access Majaro using our weight converter tool?
Our weight converter helps you track your weight in stone, lbs, or kg—useful for monitoring progress if prescribed Majaro. Our free bmi calculator shows your current category and healthy weight range. Our progress tracker lets you log changes over time. Always discuss weight management targets with your GP or prescriber.
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.