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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Mounjaro Hair Growth — UK Access & Cost
Hair loss is a reported side effect of Mounjaro (tirzepatide), though not everyone experiences it. If you're considering this prescription weight loss injection in the UK, understanding both the cost and access routes — whether through NHS specialist services or private prescription — is essential. This guide covers what you need to know about hair growth issues with Mounjaro, how to access it in the UK, and what to expect at different stages of treatment.
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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.
Mounjaro Hair Loss and UK Private Prescription Costs
Hair loss, or alopecia, is listed as a common side effect of Mounjaro (tirzepatide), occurring in up to 1 in 10 people during clinical trials. This is typically temporary and often reversible once treatment stops, though individual experiences vary. The hair loss is thought to be related to gradual weight management itself rather than the medication specifically — a phenomenon also seen with other weight loss methods.
In the UK, you can access Mounjaro through two main routes: NHS specialist weight management services or private prescription via a GPhC-registered online pharmacy. Private prescription costs typically range from £129 to £320 per month depending on your dose (from the starting 2.5mg up to the maximum 15mg). This covers the clinical assessment, prescription, and medication delivery to your home.
- Starting doses (2.5–5mg): usually £129–£180/month
- Mid-range doses (7.5–10mg): typically £180–£240/month
- Higher doses (12.5–15mg): generally £240–£320/month
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.
NHS vs Private Access — Timeline and Process
Accessing Mounjaro via the NHS requires referral to a tier 3 or tier 4 specialist weight management service through your GP. Wait times vary significantly by region, from several months to over a year in some areas. Once approved, the medication is provided at no cost via prescription.
The private route is faster: you complete an online consultation (typically 10–15 minutes) with a UK-licensed prescriber, answer health questions, and receive a prescription decision within 24 hours if approved. Your medication arrives within 2–3 working days. To use our GLP-1 weight loss calculator, you can estimate potential weight loss outcomes at different Mounjaro doses, helping you decide if treatment is right for you before committing to private prescription costs.
- 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.
Is hair loss from Mounjaro permanent?
Hair loss with Mounjaro is typically temporary and usually reverses after stopping treatment. Most people regain hair within weeks to months of discontinuing the medication. However, individual timelines vary, and some people may take longer to recover full hair growth.
Can I get Mounjaro on the NHS if I'm concerned about hair loss?
Yes, Mounjaro is available via NHS specialist weight management services if you meet eligibility criteria (BMI ≥30 or ≥27 with weight-related health conditions). However, NHS access involves referral from your GP and can have long wait times. Hair loss risk is the same whether you access via NHS or private prescription.
How quickly will I be assessed for private Mounjaro prescription?
Private online consultations are typically assessed within 24 hours. If approved, your prescription is sent to a GPhC-registered pharmacy, and medication usually arrives within 2–3 working days. The entire process from consultation to receiving your first KwikPen can take 3–5 days.
What's the difference between Mounjaro and Wegovy for hair loss?
Both Mounjaro (tirzepatide) and Wegovy (semaglutide) list hair loss as a potential side effect. Mounjaro may have slightly higher rates in clinical trials, though both are generally temporary. The choice between them depends on individual factors — your GP or prescriber will advise which is more suitable.
Does private Mounjaro cost include GP consultations?
Private Mounjaro costs (£129–£320/month) cover the initial online clinical assessment and prescription only. They do not include ongoing GP monitoring, blood tests, or NHS support. Many people continue with their NHS GP for health monitoring whilst taking privately-prescribed medication.
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.