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
Weight Loss Clinics in Glasgow — Prescription Options
If you're looking for a weight loss clinic in Glasgow offering prescription medication, you have two main pathways: NHS specialist weight management services or private online prescribing. The UK has licensed prescription medications available for eligible adults, including Mounjaro and Wegovy. This guide explains how weight loss medication works in the UK, who qualifies, and how to access support in Glasgow.
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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.
UK-Licensed Weight Loss Medications
Three prescription-only medications are licensed in the UK for weight management. Mounjaro (tirzepatide) is a once-weekly GLP-1 and GIP receptor agonist injection that works by reducing appetite and supporting satiety. Wegovy (semaglutide) is another once-weekly injection that activates the GLP-1 pathway. Saxenda (liraglutide) is a daily injection also targeting GLP-1 receptors.
Clinical trials show these medications can support significant weight loss alongside a reduced-calorie diet and increased physical activity. In the SURMOUNT-1 trial, Mounjaro achieved average weight loss of 15–21% body weight depending on dose. Wegovy trials demonstrated similar results. All three are prescription-only and require a clinical assessment to determine eligibility. Use our free GLP-1 weight loss calculator to explore potential results at different doses, and our BMI calculator to check where you currently stand on the NHS weight management scale.
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 in Glasgow
NHS access: Weight loss medication through the NHS is prescribed via tier 3 specialist weight management services. You'll need a referral from your GP to Glasgow's local weight management service. Waiting times vary significantly by region and can be substantial. Once assessed, NHS prescription weight loss medication is provided free on the NHS.
Private access: Private online clinics offer faster access without NHS referral. You complete an online consultation with a UK-licensed prescriber, and if approved, your prescription is dispensed by a GPhC-registered pharmacy. Costs typically range from £129–£320 monthly depending on dose. Speaking to your GP is still recommended—they can advise on your personal eligibility and whether prescription weight loss medication is appropriate for you.
- 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.
Who is eligible for prescription weight loss medication in the UK?
Adults with a BMI of 30 or above, or BMI of 27–29.9 with weight-related health conditions (type 2 diabetes, high blood pressure, or cardiovascular disease) may be eligible. For South Asian, Chinese, Black African, or Caribbean adults, lower thresholds apply due to higher health risks at lower BMI levels. Your GP or a licensed prescriber assesses individual eligibility.
How long does it take to lose weight on Mounjaro or Wegovy?
Weight loss occurs gradually over weeks and months. Most people notice changes within 4–8 weeks, with significant results visible by 12–16 weeks. However, individual results vary based on dose, lifestyle changes, and personal metabolism. Clinical trials followed patients for 68–72 weeks to measure full results.
Are weight loss medications available at NHS clinics in Glasgow?
Yes, Glasgow has NHS tier 3 weight management services. Access requires a GP referral. However, NHS availability of prescription medications varies by local Integrated Care Board (ICB) policy, and waiting lists can be lengthy. Ask your GP about your local options and timelines.
Can I switch between Mounjaro and Wegovy?
Switching between medications should only be done under medical supervision. While both are GLP-1-type medications, Mounjaro is a dual GIP/GLP-1 agonist, making it mechanically different from Wegovy. Any change requires a prescriber's assessment and a new prescription.
How do I know if prescription weight loss is right for me?
The best first step is speaking with your GP. They can assess your BMI, health conditions, and current treatments to advise whether prescription medication is appropriate. You can also use our free BMI calculator to check your current status and understand where you fall on NHS weight management guidelines.
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.