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
Free tracker included with every download this week
How To Do The Golden Dose Mounjaro
The "golden dose" of Mounjaro typically refers to the 10mg dose, which clinical trial data suggests may offer a balance between effectiveness and tolerability for many people. However, the right dose is individual, and your prescriber will guide you through a gradual titration schedule starting at 2.5mg. Understanding how Mounjaro (tirzepatide) dosing works, how to use your KwikPen, and what to expect at each stage is essential for safe and effective weight management.
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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.
Understanding Mounjaro Dose Titration And The Golden Dose
Mounjaro comes in a pre-filled KwikPen device and requires a once-weekly injection. The medication is not available over the counter — you need a UK prescription following a clinical assessment. Dosing starts at 2.5mg for weeks 1–4, then increases every 4 weeks: 5mg (weeks 5–8), 7.5mg (weeks 9–12), 10mg (weeks 13–16), 12.5mg (weeks 17–20), and up to the maximum 15mg dose. The "golden dose" of 10mg represents a point where many patients see significant weight loss results alongside improved tolerability compared to higher doses. Clinical trial data from SURMOUNT-1 showed that 10mg helped participants lose an average of approximately 19.5% of body weight over 72 weeks — though individual results vary considerably. Your prescriber may recommend staying at 10mg if side effects are manageable and weight loss is progressing well, rather than continuing escalation.
- Each KwikPen contains 4 doses (4 weeks of treatment)
- Minimum 4 weeks on each dose before increasing
- Maximum dose: 15mg once weekly
- Never exceed prescribed dose or increase frequency
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.
Using Your Mounjaro KwikPen And Managing The Golden Dose
When you receive your Mounjaro KwikPen prescription, follow these key steps: store unopened pens in a refrigerator (2–8°C), keep in the original carton, and do not freeze. After first use, the pen can be stored at room temperature (below 30°C) for up to 30 days. Inject once weekly on the same day each week into your stomach, thigh, or upper arm, rotating injection sites. The golden dose approach means your prescriber may pause escalation at 10mg if you're experiencing good weight loss and acceptable side effects — this is a clinical decision, not a fixed rule. Try our free GLP-1 weight loss calculator to see projected outcomes at different doses, and use our progress tracker to log your weekly weight and monitor results alongside your prescription.
- 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 golden dose of Mounjaro?
The "golden dose" typically refers to the 10mg weekly injection dose, where many people achieve significant weight loss (averaging ~19.5% body weight in trials) with manageable side effects. However, the right dose varies individually — some benefit from 7.5mg, others need 15mg. Your prescriber determines what's optimal for you.
How do I know if 10mg Mounjaro is right for me?
Your prescriber assesses tolerability, side effects, and weight loss progress at each 4-week interval. If you're losing weight consistently and side effects are manageable at 10mg, staying at this dose is a valid option. If you're not losing enough weight or have minimal side effects, further escalation may be recommended.
Can I skip from a lower dose directly to 10mg?
No. Mounjaro requires gradual dose titration: you must spend minimum 4 weeks on each dose before increasing. Skipping doses increases nausea and side effects risk. Always follow your prescriber's escalation schedule.
What are common side effects at the golden dose (10mg)?
At 10mg, common side effects include nausea, diarrhoea, constipation, and stomach pain. Most people find these improve over time. Rare but serious risks include pancreatitis (severe back pain) or gallbladder problems. Seek urgent medical advice for severe symptoms.
Is the golden dose covered by NHS in the UK?
Tirzepatide (Mounjaro) is NICE-approved for NHS specialist weight management services, but availability varies by region and waiting lists can be long. Many people access it privately via online prescription following clinical assessment. Ask your GP about NHS tier 3 specialist services in your area.
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.