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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How To Get Golden Dose From Mounjaro Pen
The "golden dose" from Mounjaro refers to the dose that works best for your individual weight loss and health goals — typically between 10 mg and 15 mg for most people. However, there's no single dose that works for everyone. Your prescriber will guide you through a gradual titration schedule starting at 2.5 mg, increasing every 4 weeks until you reach the dose that delivers the best results for you. Understanding how Mounjaro's KwikPen dose progression works helps you manage expectations and get the most from your 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.
Understanding Mounjaro Dose Titration And Your Optimal Dose
Mounjaro (tirzepatide) is not prescribed at full strength immediately. Instead, your prescriber uses a structured dose titration schedule that gradually increases your dose every 4 weeks. This approach allows your body to adjust and helps identify your optimal therapeutic dose — the dose that provides the best weight loss and metabolic benefits while minimising side effects.
The standard Mounjaro titration schedule is:
- Weeks 1–4: 2.5 mg once weekly (starting dose)
- Weeks 5–8: 5 mg once weekly
- Weeks 9–12: 7.5 mg once weekly
- Weeks 13–16: 10 mg once weekly
- Weeks 17–20: 12.5 mg once weekly
- Week 21+: 15 mg once weekly (maximum dose)
Many people find their "golden dose" — the dose producing optimal results — somewhere in the 10–15 mg range, though some achieve excellent results at lower doses. Your prescriber may pause dose escalation if you're experiencing significant side effects or excellent results at your current dose. The goal is finding your personal sweet spot, not automatically reaching the maximum dose.
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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.
What "Golden Dose" Really Means And How To Know When You've Found It
The term "golden dose" is not an official medical term — it's a patient-coined phrase describing the dose where you experience meaningful weight loss with manageable side effects. This varies dramatically between individuals. For some, it's 7.5 mg; for others, it's 15 mg. Your prescriber assesses your progress at each 4-week interval by reviewing your weight loss, how you're tolerating the medication, and any side effects you're experiencing.
You've likely found your golden dose when: you're losing weight consistently, side effects are tolerable (typically nausea and appetite suppression ease as your body adjusts), you're maintaining energy for daily activities, and your prescriber confirms your progress. Use our free GLP-1 weight loss calculator to project potential outcomes at different tirzepatide doses — this can help you discuss realistic expectations with your prescriber.
- 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 I ask my prescriber to skip doses and jump to a higher Mounjaro dose?
No. The 4-week minimum at each dose is essential for safety and efficacy. Jumping doses increases nausea, diarrhoea, and other side effects without improving weight loss. Your prescriber follows strict titration guidelines. If you're eager to progress, discuss your timeline at your next review — your prescriber can assess whether it's safe to continue escalating.
What if I find my golden dose at 10 mg and don't want to increase further?
This is perfectly acceptable. Your prescriber will not force you to escalate to 15 mg if you're achieving good results at 10 mg with manageable side effects. The goal is optimal results for you individually, not reaching maximum dose. Continue the dose that works best for your health.
Is the golden dose the same for everyone using Mounjaro?
No. The golden dose varies significantly between individuals based on genetics, metabolism, starting weight, health conditions, and how your body responds. Some people achieve excellent results at 5 mg; others need 15 mg. Your prescriber personalises your titration schedule based on your individual progress.
How do I know if side effects are normal at each Mounjaro dose increase?
Nausea, appetite suppression, and mild GI changes are common during titration. Most improve within 1–2 weeks as your body adjusts. Contact your prescriber if you experience severe, persistent stomach pain, vomiting lasting >2 days, or serious allergic reactions. They can advise whether to slow titration or adjust your dose.
What if I experience bad side effects — can I stay on a lower Mounjaro dose?
Yes. If side effects are severe at a higher dose, your prescriber can recommend staying at the previous dose or temporarily pausing escalation. Your body may tolerate the medication better after 1–2 weeks, allowing future escalation. Never stop Mounjaro abruptly — always follow your prescriber's guidance on dose adjustments.
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.