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
Mounjaro 7.5mg Weight Loss — What the Evidence Shows
Mounjaro 7.5mg is a mid-range dose in the weight loss titration schedule, typically used for 4–8 weeks during dose escalation. While individual experiences vary widely, clinical trial data and user reports provide a realistic picture of what to expect at this dose. This guide covers typical weight loss outcomes, common experiences, and how 7.5mg compares to other doses of this prescription injection.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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.
What Clinical Evidence Shows About Mounjaro 7.5mg Weight Loss
Mounjaro (tirzepatide) is a prescription-only weekly weight loss injection licensed in the UK. The 7.5mg dose sits in the middle of the five-dose titration schedule (2.5mg → 5mg → 7.5mg → 10mg → 15mg), typically given for weeks 9–12 as the dose is escalated.
The SURMOUNT-1 clinical trial provides the most reliable data on Mounjaro weight loss. Trial participants using the full 15mg maintenance dose lost an average of approximately 20.9% of their body weight over 72 weeks, alongside a reduced-calorie diet and increased physical activity. At intermediate doses like 7.5mg, weight loss is typically slower than at 15mg but accumulating steadily. Individual results vary significantly — some users report noticeable loss at 7.5mg, whilst others find the most substantial changes occur after moving to 10mg or 15mg. The dose is gradually increased precisely to find the level that works for each person whilst managing side effects.
It's crucial to understand that Mounjaro is not a standalone weight loss solution — clinical trial results were achieved alongside dietary changes and increased physical activity. Results depend on individual factors including starting weight, metabolism, adherence to lifestyle changes, and how your body responds to the medication.
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.
Common Experiences at the 7.5mg Dose
Users transitioning to Mounjaro 7.5mg often report that appetite suppression becomes noticeably more pronounced compared to 5mg, with fuller feelings after smaller meals and reduced food cravings. Many describe a clearer sense of satiety and less interest in snacking. Nausea may be present initially when moving from 5mg to 7.5mg but often reduces as the body adjusts over the four weeks at this dose.
Gastrointestinal side effects like constipation or diarrhoea can persist at 7.5mg but typically stabilise with hydration and dietary adjustments. Some users report fatigue in the first week at a new dose, which generally improves. Weight loss at 7.5mg varies: whilst some see 1–2kg loss per week, others progress more gradually. This is entirely normal — your prescriber monitors your response and adjusts accordingly. Track your progress using our free progress tracker to see your personal trajectory at this dose.
- 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.
How much weight should I lose on Mounjaro 7.5mg per week?
There is no "should" — weight loss varies widely between individuals. Clinical trials show average loss of approximately 0.5–1kg per week when combined with dietary and lifestyle changes, though some people lose more, others less. 7.5mg is typically a middle dose, so results accumulate gradually before reaching maintenance doses. Your prescriber monitors your progress and adjusts your dose if needed.
Is Mounjaro 7.5mg the highest dose I'll need?
No. Mounjaro titrates from 2.5mg up to a maximum of 15mg. At 7.5mg you're at the mid-point of the schedule. Most people progress to 10mg and then 15mg over weeks 13–20+, unless side effects or personal preference suggests staying at a lower dose.
How does Mounjaro 7.5mg compare to Wegovy at equivalent doses?
Mounjaro is a dual GIP and GLP-1 agonist, whilst Wegovy (semaglutide) is GLP-1 only. Clinical trials suggest Mounjaro may produce slightly greater average weight loss, though individual responses differ. Both require prescription and clinical assessment. Your prescriber helps determine which is appropriate for you.
Should I stay on Mounjaro 7.5mg or move to a higher dose?
Your prescriber decides when to progress to the next dose based on your weight loss progress, tolerance of side effects, and overall health. Some people do well at lower doses; others need the full 15mg for maximum effect. This is individual — not everyone needs the maximum dose.
Can I use a weight loss calculator to predict my 7.5mg results?
Our GLP-1 weight loss calculator can estimate potential weight loss at different doses based on clinical trial averages, though your actual results may differ. Individual outcomes depend on many factors. Use it as a rough guide alongside discussion with your prescriber about realistic expectations at each dose. ```
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.