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
Jeera in Weight Loss — What UK Adults Should Know
Jeera (cumin seeds) has been used in traditional medicine for centuries, and some people believe it may support weight management. However, scientific evidence for jeera alone is limited. If you're looking to lose weight in the UK, prescription weight loss medications—available through the NHS or private prescription—are evidence-based options backed by clinical trials. This guide explains what's actually available to eligible adults and how to find out if prescription weight management is right for you.
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.
UK-Licensed Prescription Weight Loss Options
For UK adults struggling with excess weight, the NHS and private prescribers offer three prescription medications with strong clinical evidence:
- Mounjaro (tirzepatide) — a dual GIP and GLP-1 receptor agonist, given once weekly by injection. Clinical trials showed average weight loss of 15–21% of body weight.
- Wegovy (semaglutide) — a GLP-1 receptor agonist, once weekly injection. Average weight loss in trials was around 15% of body weight.
- Saxenda (liraglutide) — a GLP-1 receptor agonist, given as a daily injection. Typically produces 5–clinically studied weight loss.
All three are prescription-only and require a clinical assessment before being prescribed. Eligibility is based on your BMI and health conditions. Use our free BMI calculator above to check where you currently stand, and our GLP-1 weight loss calculator to see potential outcomes at different doses.
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 Access vs Private Prescription in the UK
In the UK, prescription weight loss medication is available through two routes. NHS access is through specialist tier 3 weight management services—usually by GP referral—though availability and waiting times vary significantly by region. Private access is through online consultations with UK-licensed prescribers, available without NHS referral. Your GP can discuss which route is most appropriate for you. If you think you may be eligible, the first step is a conversation with your GP about your weight management options, your BMI, and any weight-related health conditions you may have.
- 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 jeera actually effective for weight loss?
Jeera has been used in traditional medicine for digestive support, but scientific evidence for weight loss is limited. If you're looking for evidence-backed weight management, prescription GLP-1 medications available in the UK—Mounjaro, Wegovy, and Saxenda—have strong clinical trial data showing real weight loss results.
How do I know if I'm eligible for prescription weight loss medication in the UK?
Generally, you may be eligible if you have a BMI of 30 or above, or a BMI of 27–29.9 with weight-related health conditions like high blood pressure, type 2 diabetes, or sleep apnoea. Your GP or a licensed prescriber can assess your individual eligibility following a clinical assessment.
What's the difference between Mounjaro and Wegovy?
Both are once-weekly injections available in the UK. Mounjaro is a dual GIP and GLP-1 agonist with slightly higher average weight loss (15–21%) in trials, while Wegovy is a GLP-1 agonist only, with average weight loss around 15%. A prescriber will advise which is more suitable for you.
How much weight can I expect to lose with prescription medication?
In clinical trials, people using these medications lost between 5–21% of their body weight, depending on the medication and dose. Individual results vary significantly. Weight loss works best alongside a reduced-calorie diet and increased physical activity. Use our weight loss calculator to see projected outcomes.
Can I get prescription weight loss medication through the NHS?
Yes, the NHS offers prescription weight loss medications through specialist weight management services (tier 3). Access is usually by GP referral. However, availability and waiting times vary widely by region. Ask your GP about referral options in your area.
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.