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Used by Mounjaro & Wegovy patients across the UK

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
Get the guide + free tracker — £1.99 →

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GLP-1 Medication Guide — 11 chapters, 100+ pages, NHS-aligned with free 52-week weight loss tracker calendar
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Weight Loss Retreat Dubai — What UK Adults Should Know

Weight loss retreats in Dubai offer immersive wellness programmes combining fitness, nutrition, and lifestyle support in a luxury setting. However, for UK adults seeking effective weight management, there are often more accessible and evidence-based options available through the NHS and private UK providers. Whether you're considering a destination retreat or exploring weight loss medication like GLP-1 injections, understanding what works and what's available in the UK is essential for making an informed choice about your health.

10,000+ calculations today · NHS-aligned thresholds · 100% free

26%of UK adults are living with obesityNHS Digital, 2023
64%of adults in England are overweight or obeseHealth Survey for England
£6.5bnannual cost of obesity to the NHSPublic Health England
4.7Mpeople in England eligible for weight loss drugsNICE estimates, 2024

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.

Below 18.5Underweight
18.5 – 24.9Healthy
25 – 29.9Overweight
30+Obese

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.

Weight Loss Retreats vs UK-Based Weight Management Options

Weight loss retreats in Dubai typically cost £2,000–£8,000+ per week and focus on intensive fitness programmes, nutritionist-led meal planning, and behavioural coaching in a resort environment. While these can provide a focused reset and motivational boost, the results depend heavily on maintaining changes after returning home.

  • Retreat benefits: Professional supervision, immersive environment, intensive support, social motivation
  • Retreat limitations: High cost, temporary environment, travel time, results often not sustained long-term

UK-based weight management through the NHS offers free tier 1–3 services including digital tools, behaviour change programmes, and specialist multidisciplinary teams. Private UK providers include prescription weight loss medication (Mounjaro, Wegovy, Saxenda), online consultations, and remote progress tracking. These options are typically more affordable and easier to sustain, with evidence showing that prescription weight loss medication combined with lifestyle changes produces sustained results. Try our free BMI calculator above to understand your starting point, then explore whether NHS or private weight management services suit your needs.

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How It Works

Three simple steps to understand your weight and take action.

1Check Your BMI

Enter your height and weight in our free calculator. Get your BMI, NHS category, healthy weight range, and ethnicity-adjusted thresholds instantly.

2Explore Your Options

If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.

3Track Your Progress

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.

How UK Weight Loss Medication Compares to Retreat-Based Approaches

GLP-1 weight loss injections like Wegovy (semaglutide) and Mounjaro (tirzepatide) are prescription-only medicines available in the UK through NHS specialist services or private online prescribing. Clinical trials show these may help adults lose an average of 14–21% of body weight when combined with a reduced-calorie diet and increased physical activity—results comparable to or better than retreat-based weight loss, with lower cost.

Unlike a one-off retreat experience, prescription weight loss treatment is ongoing, allowing continuous support and dose adjustments. The NHS recommends losing weight at a rate of 0.5–1 kg per week for sustainable results. Our GLP-1 weight loss calculator can help you estimate potential outcomes at different doses. For UK eligibility, you need a BMI of 30 or above (or 27+ with weight-related health conditions), assessed through your GP or a licensed prescriber.

Weight loss retreats in Dubai offer an intensive, immersive experience but results often depend on maintaining behaviour change after returning home. UK-based alternatives—whether NHS weight management services, private coaching, or prescription medication—provide more continuous support and are typically more affordable. The most effective approach combines professional guidance with realistic lifestyle changes you can sustain long-term. Use our free progress tracker to monitor your weight loss journey regardless of which path you choose. Your GP can advise whether NHS specialist services or private prescription weight loss treatment is right for you.

Mounjaro (Tirzepatide)
  • 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
Read our full Mounjaro guide →
Wegovy (Semaglutide)
  • 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
Read our full Wegovy guide →

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.

FeatureMounjaroWegovy
Drug classDual GIP/GLP-1 agonistGLP-1 agonist
Active ingredientTirzepatideSemaglutide
Avg. weight loss15–22.5%12–17%
Key trialSURMOUNT-1 (2022)STEP 1 (2021)
Max dose15 mg weekly2.4 mg weekly
Escalation period20–32 weeks16–20 weeks
AdministrationWeekly injection (pen)Weekly injection (pen)
NHS availabilityPrivate prescription onlyNHS & private
Approx. private cost£150–£250/month£150–£300/month
Common side effectsNausea, diarrhoea, constipationNausea, 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.

Standard eligibility
  • BMI of 30 or above (obese)
  • Age 18 or over
  • No contraindicated conditions
  • Committed to lifestyle changes
With comorbidities
  • 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.

Are weight loss retreats in Dubai worth the cost for UK adults?

Retreats can provide motivation and intensive support, but results depend on sustaining changes afterward. For similar or better outcomes at lower cost, UK adults can access NHS weight management services (free) or private prescription weight loss medication (from ~£129/month). The key is choosing an approach you can maintain long-term.

What's the difference between Mounjaro and Wegovy for weight loss?

Both are prescription-only injections, but Mounjaro (tirzepatide) is a dual GIP+GLP-1 receptor agonist, while Wegovy (semaglutide) is a GLP-1 agonist only. Clinical trials show Mounjaro may produce slightly greater average weight loss (up to 21% vs 15%), but individual results vary significantly. A prescriber will assess which is suitable for you.

How do I access weight loss medication on the NHS in the UK?

Ask your GP for a referral to a tier 3 specialist weight management service. You'll need a BMI of 30+ (or 27+ with weight-related health conditions). NHS availability varies by region, and waiting lists can be lengthy. Alternatively, private online prescribing offers faster access following a clinical assessment.

Can weight loss medication replace exercise and diet changes?

No. Prescription weight loss medication like Mounjaro and Wegovy work best alongside a reduced-calorie diet and increased physical activity. They help reduce appetite and support feeling fuller, but sustainable results require lifestyle changes. The NHS recommends combining medication with behaviour change support.

What's a realistic timeline for weight loss with UK treatment options?

The NHS recommends losing 0.5–1 kg per week for sustainable results. With GLP-1 medication combined with lifestyle changes, clinical trials showed average weight loss of 14–21% over 52–72 weeks. Results vary individually. Use our free weight loss calculator to estimate potential outcomes based on medication 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.

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