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 Reduce Cholesterol Levels?
Mounjaro (tirzepatide) is a prescription-only injection licensed in the UK for weight management. Beyond supporting weight loss, emerging evidence suggests it may help improve cholesterol levels, particularly LDL cholesterol and triglycerides. This happens partly through weight loss itself, and partly through Mounjaro's direct effects on fat metabolism. However, individual results vary significantly, and cholesterol improvements are not assured. Your GP can assess whether Mounjaro is suitable for your specific health needs.
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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 Mounjaro May Affect Cholesterol and Blood Fats
Mounjaro works as a dual GIP and GLP-1 receptor agonist, activating two natural hormone pathways that regulate appetite and glucose control. This dual mechanism may have beneficial effects on blood lipid profiles beyond simple weight loss.
How cholesterol may improve:
- Weight loss itself reduces LDL ("bad") cholesterol and triglycerides
- Tirzepatide may directly improve fat utilisation and reduce hepatic fat storage
- Reduced abdominal fat is associated with better cholesterol markers
- Lower triglycerides often follow sustained weight loss on Mounjaro
Clinical evidence shows that patients on Mounjaro dosing schedules (from 2.5 mg up to 15 mg weekly) experienced improvements in lipid profiles alongside weight loss. However, cholesterol response is individual—some patients see significant improvement, others see modest changes. Improvements typically develop over weeks to months as weight loss progresses. If you're taking cholesterol medication, your GP should monitor your levels while on Mounjaro, as doses may need adjustment.
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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.
UK Access, Cost, and How to Get Mounjaro for Cholesterol and Weight
NHS access: Mounjaro via the NHS is prescribed through specialist tier 3/4 weight management services, not standard GP prescription. Eligibility requires BMI ≥30 or BMI 27–29.9 with weight-related health conditions (including high cholesterol or abnormal blood fats). Access varies significantly by region and waiting lists can be long.
Private UK access: Available through GPhC-registered online pharmacies following clinical assessment by a UK-licensed prescriber. Costs typically range from £129–£320 monthly depending on your dose. The consultation process involves completing a health questionnaire, and a prescriber will assess suitability before issuing a prescription. Our GLP-1 weight loss calculator can help you estimate potential outcomes at different doses, while the BMI calculator shows whether you meet standard eligibility criteria.
- 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 definitely lower my cholesterol?
No. While clinical evidence shows many patients experience improved cholesterol levels, results vary individually. Weight loss itself helps reduce LDL and triglycerides, but the amount of improvement depends on your starting levels, genetics, diet, and how much weight you lose. Your GP should monitor your cholesterol regularly while taking Mounjaro.
How long does it take to see cholesterol improvements on Mounjaro?
Cholesterol improvements typically appear over several weeks to months as weight loss progresses. Most people reach stable doses by week 17–20 (15 mg maintenance), with continued weight loss and metabolic improvements over the following months. Regular blood tests will show when your levels improve.
Can I stop taking my cholesterol medication if I start Mounjaro?
No—never stop cholesterol medication without your GP's guidance. Some patients may eventually need dose reductions as their cholesterol improves on Mounjaro, but this must be managed by your prescriber through regular blood tests. Stopping medication abruptly increases cardiovascular risk.
Is Mounjaro available on the NHS for cholesterol improvement?
Mounjaro is NHS-prescribed for weight management through specialist services, not specifically for cholesterol. However, if you meet eligibility (BMI ≥30 or BMI 27–29.9 with conditions like dyslipidaemia), your specialist may consider it. Access varies by region and waiting times can be lengthy.
What's the difference between Mounjaro and Wegovy for cholesterol?
Both may help improve cholesterol through weight loss and metabolic effects. Mounjaro is a dual GIP+GLP-1 agonist; Wegovy (semaglutide) is GLP-1 only. Clinical trials show both support similar average weight loss (~15–21%), so cholesterol benefits are comparable. Choice depends on individual suitability, assessed by your 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.