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 Weight Loss Hypnosis Actually Work?
Weight loss hypnosis is popular, but the scientific evidence for its effectiveness is limited. While some people report modest weight loss after hypnotherapy, research shows results are typically small and rarely sustained long-term without lifestyle changes. If you're exploring weight management options in the UK, there are evidence-based approaches — including prescription weight loss medication, dietary changes, and NHS weight management programmes — that have stronger clinical support. This guide explains what the evidence shows and what actually works for sustainable weight loss.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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 Say About Hypnosis for Weight Loss?
Clinical trials on hypnotherapy for weight loss show modest results at best. A 2020 review of hypnotherapy studies found average weight loss of around 2–3 kg over several months — significantly less than other established methods. Most studies also show that any weight loss tends to regress without ongoing behavioural support.
The issue is that hypnosis alone does not address the underlying habits, emotional eating patterns, or nutritional knowledge that drive weight gain. Weight loss requires sustained changes to diet and activity — hypnosis cannot replace this.
In contrast, prescription weight loss medications like GLP-1 injections (Wegovy and Mounjaro) have demonstrated weight loss of 15–21% of body weight in clinical trials, when combined with lifestyle changes. These are NHS-recognised options that may be available through specialist weight management services or private prescribing in the UK.
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.
Evidence-Based Alternatives for Weight Management in the UK
NHS Weight Management: The NHS provides tier 1 and tier 2 weight management support, including behaviour change programmes and digital tools, completely free. Tier 3 specialist services can assess eligibility for prescription weight loss medication if you have a BMI of 30 or above, or 27 or above with weight-related health conditions.
Prescription Weight Loss Medication: Wegovy (semaglutide) and Mounjaro (tirzepatide) are prescription-only GLP-1 medications licensed in the UK for weight management. These work alongside reduced-calorie diet and increased physical activity — not as standalone solutions. Available through NHS specialist services or private assessment.
Check your personal BMI using our free BMI calculator to understand where you sit on the NHS weight categories, then discuss options with your GP.
- 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 weight loss hypnosis approved by the NHS?
No. The NHS does not recommend hypnotherapy as a standard weight loss treatment. It is not available on the NHS for weight management. The NHS supports evidence-based approaches including behaviour change programmes, dietary intervention, physical activity, and prescription medication where clinically appropriate.
Why do some people claim hypnosis helped them lose weight?
Hypnosis may support relaxation and stress reduction, which can indirectly help some people make better food choices. However, any weight loss is likely due to the accompanying lifestyle changes (diet, exercise) rather than hypnosis itself. Placebo effect and motivation also play a role.
What is the difference between hypnosis and cognitive behavioural therapy for weight loss?
Cognitive behavioural therapy (CBT) has strong clinical evidence for weight loss and is recommended by the NHS. CBT teaches practical skills to change eating patterns and habits. Hypnosis lacks equivalent scientific support. Both may involve relaxation, but CBT is more structured and evidence-based.
Can I use weight loss hypnosis alongside prescription medication like Wegovy?
There is no clinical reason you cannot use both, but it is unnecessary. Wegovy, when combined with dietary changes and physical activity, has demonstrated significant weight loss in clinical trials. Adding hypnosis is unlikely to improve results. Discuss any complementary approaches with your prescriber.
What is the most effective weight loss method available in the UK?
Sustainable weight loss requires a calorie deficit, typically 500 kcal per day for gradual loss of 0.5–1 kg per week. NHS programmes, behaviour change support, and — where eligible — prescription weight loss medication like Mounjaro or Wegovy, all have evidence supporting them. Use our GLP-1 weight loss calculator to explore potential outcomes with 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.