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 Hypnosis Really Help with Weight Loss?
Hypnosis is often promoted as a weight loss solution, but the evidence for its effectiveness is limited and mixed. While some people report modest benefits, there's no scientific consensus that hypnosis alone causes significant weight loss. If you're interested in weight management in the UK, prescription weight loss medication, lifestyle changes, and NHS support services are evidence-based approaches worth exploring with your GP.
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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.
What Does the Research Actually Show?
Clinical studies on hypnosis for weight loss have produced inconsistent results. Some small trials suggest hypnotherapy may help with appetite control and eating behaviours, but these effects are generally modest — often no better than standard dietary advice alone.
- Limited evidence base: Most hypnosis studies are small with short follow-up periods
- Variable outcomes: Individual responses to hypnotherapy differ widely
- Cost: Private hypnotherapy typically costs £50–£200+ per session with no NHS funding
- Time investment: Multiple sessions may be required with uncertain results
In contrast, prescription weight loss medication approved by the MHRA — such as GLP-1 injections — has robust clinical trial data showing 15–21% average body weight loss. These medicines are available through NHS specialist services or private prescription in the UK.
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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.
Proven UK Approaches to Weight Management
The NHS emphasises sustainable weight management through lifestyle changes combined with professional support. Effective approaches include reduced-calorie diets (approximately 500 kcal deficit daily for 0.5kg weekly loss), increased physical activity, and behavioural support through tier 3 weight management services.
For adults with a BMI of 30 or above, or 27 and above with weight-related health conditions like type 2 diabetes or high blood pressure, prescription weight loss treatment may be appropriate. Your GP can assess eligibility and refer you to specialist services. Calculate your personal BMI using our free BMI calculator above to understand where you stand.
Weight loss injections like Mounjaro and Wegovy are prescription-only medicines that work alongside diet and exercise. Try our GLP-1 weight loss calculator to estimate potential outcomes at different doses. Track your progress with our free progress tracker, and convert your weight between kg and stone using our weight converter to monitor changes in UK measurements.
- 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 hypnotherapy an NHS treatment for weight loss?
Hypnotherapy is not routinely available on the NHS for weight loss. The NHS focuses on lifestyle programmes, dietary support, and prescription weight loss medications through tier 3 specialist services. Private hypnotherapy is available but costs vary significantly and evidence for effectiveness is limited.
Can hypnosis replace diet and exercise for weight loss?
No. Hypnosis cannot replace a calorie deficit and physical activity — these are fundamental to sustainable weight loss. Even if hypnotherapy helps with psychological aspects of eating, weight loss still requires dietary changes and increased activity. Any approach claiming otherwise is not evidence-based.
How does prescription weight loss medication compare to hypnosis?
Prescription GLP-1 medications like Wegovy and Mounjaro have strong clinical evidence — STEP and SURMOUNT trials showed 15–21% average body weight loss alongside lifestyle changes. Hypnosis evidence is much weaker and more variable. Prescription medications require a clinical assessment and are available through NHS specialist services or private prescription.
What's the most effective weight loss approach recommended by NHS?
The NHS recommends a combination: reduced-calorie diet (500 kcal daily deficit for 0.5kg weekly loss), physical activity, and behavioural support. For eligible adults (BMI ≥30 or ≥27 with health conditions), prescription weight loss treatment can be added. Tier 3 specialist services assess individual suitability.
Should I try hypnosis before seeing my GP about weight loss?
If you're struggling with weight management, speaking to your GP first is sensible. They can assess your health, discuss evidence-based options (lifestyle support, prescription treatment), and refer you to specialist services if appropriate. Private hypnotherapy is an option but has weaker evidence than NHS-supported approaches.
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.