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
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Is yogurt good for weight loss?
Yogurt can be a helpful part of a weight loss diet, particularly Greek yogurt which is high in protein and supports satiety. However, weight loss ultimately depends on overall calorie intake and lifestyle. For adults struggling with weight management, the NHS and private sector now offer prescription weight loss options. If you have a BMI of 30 or above, or 27 with weight-related health conditions, you may be eligible for medication support alongside dietary changes like including yogurt in a healthy eating plan.
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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.
Prescription weight loss options available in the UK
Three prescription medications are licensed for weight management in the UK:
- Mounjaro (tirzepatide) — a dual GIP and GLP-1 injection. Clinical trials showed participants lost an average of 15–21% of their body weight over 72 weeks, though individual results vary significantly.
- Wegovy (semaglutide) — a GLP-1 injection with an average weight loss of around 15% in clinical trials alongside reduced-calorie diet and increased physical activity.
- Saxenda (liraglutide) — a daily GLP-1 injection for weight management in eligible adults.
All three are prescription-only and require a clinical assessment. These medications work best when combined with healthy eating habits — yogurt included — and regular physical activity. Use our GLP-1 weight loss calculator to explore potential outcomes at different doses if you're eligible.
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 and eligibility
NHS access: Prescription weight loss medication is available through tier 3 specialist weight management services. You'll need a referral from your GP, and availability varies significantly by region. Waiting lists can be lengthy in many areas.
Private access: Licensed prescribers offer online consultations — no NHS referral needed. Following clinical assessment, a prescription can be dispensed by a GPhC-registered pharmacy.
Eligibility: Adults with a BMI of 30 or above, or 27–29.9 with weight-related conditions (type 2 diabetes, high blood pressure, sleep apnoea, cardiovascular disease), may qualify. South Asian, Chinese, Black African, and Black Caribbean adults have lower thresholds. Your GP can assess whether prescription support is right for you — discuss weight management options including both lifestyle changes and medication at your next appointment.
- 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 Greek yogurt better for weight loss than regular yogurt?
Greek yogurt typically contains more protein (15–20g per serving vs 3–4g in regular yogurt) and less sugar, making it more satiating. High-protein foods help preserve muscle during weight loss and support feeling fuller longer. Choose plain, unsweetened Greek yogurt and avoid versions with added sugar. Check the nutrition label to ensure you're selecting a lower-sugar option.
Can yogurt alone help me lose weight?
No single food causes weight loss. Yogurt can support weight management as part of a calorie-controlled diet when combined with regular physical activity. Weight loss requires an overall calorie deficit. If dietary changes alone aren't sufficient, your GP can discuss prescription weight loss medication eligibility based on your BMI and health profile.
How much yogurt should I eat daily for weight loss?
There's no set amount — it depends on your overall calorie goals and diet composition. A typical serving is 150–200g. Include yogurt as part of a balanced diet with adequate protein, fibre, and whole foods. Our BMI calculator can help you understand your weight management goals; your GP can provide personalised dietary advice.
What's the difference between Mounjaro and Wegovy for weight loss?
Both are injectable medications for weight management. Mounjaro (tirzepatide) is a dual GIP and GLP-1 medication with clinical trial average weight loss of 15–21%. Wegovy (semaglutide) is GLP-1 only with average weight loss around 15%. Individual results vary. Both require prescription and clinical assessment. Your prescriber can advise which is more suitable for you.
Can I get prescription weight loss medication on the NHS?
Yes, if you meet eligibility criteria (BMI 30+ or 27+ with weight-related health conditions). Access is through specialist tier 3 weight management services — ask your GP for a referral. Availability and waiting times vary by region. Private consultations with licensed prescribers offer quicker access if you don't qualify for NHS services or prefer not to wait.
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.