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
Does Mounjaro Help With Inflammation?
Mounjaro (tirzepatide) is primarily a weight management injection, not an anti-inflammatory medication. However, research suggests that significant weight loss achieved with Mounjaro may help reduce chronic inflammation in the body — since excess weight itself is a major driver of inflammatory responses. This guide explains what the evidence shows, how weight loss and inflammation are connected, and what to expect if you're considering Mounjaro for weight management in the UK.
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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.
How Weight Loss Reduces Inflammation
Mounjaro doesn't directly target inflammation like anti-inflammatory medications do. Instead, it works by reducing appetite and supporting weight loss through its dual GIP and GLP-1 receptor agonist mechanism. The anti-inflammatory benefit comes from the weight loss itself.
Excess body fat, particularly around the abdomen, actively produces inflammatory proteins called cytokines. When you lose weight, fat tissue decreases, which naturally reduces these inflammatory markers. Clinical research shows that losing even 5–10% of body weight can significantly lower:
- C-reactive protein (CRP) — a key marker of inflammation
- TNF-alpha and IL-6 — inflammatory cytokines
- Inflammatory markers linked to cardiovascular disease
In SURMOUNT trials, participants using tirzepatide lost an average of 15–21% of their body weight, which would be expected to produce meaningful reductions in chronic inflammation markers. However, individual results vary, and inflammation reduction depends on achieving and maintaining weight loss.
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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.
Accessing Mounjaro in the UK: Cost and Routes
Mounjaro is available in the UK through NHS specialist weight management services or private prescription routes. NHS access is limited and involves referral to tier 3 specialist services, with significant waiting times in many regions.
Private prescription Mounjaro is available through GPhC-registered online prescribers following a clinical assessment. Costs range from approximately £130–£320 per month depending on the dose, with lower doses (2.5–5 mg starting) costing less than higher maintenance doses (10–15 mg). Your prescriber will assess your eligibility based on BMI (typically 30+, or 27+ with weight-related health conditions) and medical history. Many people find using our GLP-1 weight loss calculator helpful to project potential weight loss at different Mounjaro doses before starting treatment.
- 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.
Will Mounjaro directly reduce my inflammation?
No — Mounjaro is not an anti-inflammatory medicine. It's a weight management injection. However, the weight loss it helps support may reduce chronic inflammation because excess body fat produces inflammatory markers. If you have a specific inflammatory condition, discuss with your GP whether weight loss medication is appropriate alongside any other treatment.
How much weight loss is needed to see inflammation improvements?
Research suggests that losing even 5–10% of body weight can reduce inflammatory markers like CRP. In clinical trials, Mounjaro users lost an average of 15–21% of body weight, which would be expected to produce meaningful inflammation reduction. Results vary between individuals, and maintaining the weight loss is important.
Is Mounjaro available on the NHS for weight management?
Yes, NICE has approved tirzepatide for NHS specialist weight management services. However, access is through tier 3 specialist services (not standard GP prescription), and waiting times vary significantly by region — some areas have waits of months or years. Private prescription is available more quickly through online clinical assessments.
What does Mounjaro cost on prescription in the UK?
Private prescription costs range from approximately £130–£320 per month depending on dose. Starting doses (2.5–5 mg) are cheaper than higher maintenance doses (10–15 mg). Prices vary between prescribers. NHS access is free but involves waiting for specialist referral. Always confirm costs with your chosen prescriber before starting.
How do I access a Mounjaro prescription in the UK?
NHS route: referral from your GP to a specialist weight management service (tier 3). Private route: online consultation with a UK-licensed prescriber through GPhC-registered services. Both require clinical assessment of your BMI, medical history, and eligibility. You'll need a BMI of 30+ (or 27+ with weight-related conditions) to qualify. Use our BMI calculator to check your starting point.
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.