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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What Is Food Noise on Mounjaro?
Food noise refers to the constant background thoughts about food, eating, cravings, and hunger that many people experience throughout the day. On Mounjaro (tirzepatide), users often report a significant reduction in food noise — meaning fewer intrusive thoughts about eating between meals. This reduction is one of the most commonly reported benefits of the medication and can make weight management feel considerably easier. Understanding how food noise works and why Mounjaro may help reduce it can give you insight into how the medication supports weight loss beyond simply suppressing appetite.
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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.
How Mounjaro Reduces Food Noise
Food noise is the brain's constant internal dialogue about food — the "what should I eat next?" or "I want that snack" thoughts that run throughout the day, even when you're not physically hungry. For many people struggling with weight management, food noise is exhausting and makes it harder to stick to healthier eating patterns.
Mounjaro works as a dual GIP and GLP-1 receptor agonist, which means it activates two natural hormone pathways that regulate appetite and satiety. These hormones signal to your brain that you are satisfied after eating, and they also reduce the intensity of cravings and food-related thoughts. Users often describe this as a "quieting" of the constant urge to eat or think about food.
The reduction in food noise typically happens within the first few weeks of starting Mounjaro, though individual experiences vary. Clinical trial participants reported not just eating less, but thinking about food less — which many found to be the most liberating aspect of the medication. This mental relief can make sustainable weight loss feel more manageable compared to traditional calorie restriction alone.
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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.
Food Noise vs. Physical Hunger
It's important to understand the difference between food noise and genuine physical hunger. Physical hunger is your body's signal that it needs fuel — stomach rumbling, low energy, or actual metabolic need. Food noise, by contrast, is psychological — it's your brain's reward system, habit, or emotional response triggering thoughts about eating.
Mounjaro primarily reduces food noise — the psychological component — while also affecting satiety, so you feel physically fuller after meals. This dual action helps address both the mental and physical aspects of appetite regulation. Users frequently report that on Mounjaro, they can distinguish between genuine hunger and idle food thoughts much more clearly, which helps them make more intentional eating choices.
Use our free GLP-1 weight loss calculator to explore how Mounjaro might support your weight management goals based on your current weight and height. Additionally, our BMI calculator can help you understand your starting point and set realistic health targets.
- 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 food noise the same as cravings?
Food noise and cravings are related but different. Food noise is constant background thinking about food — intrusive thoughts that don't necessarily signal hunger. Cravings are specific desires for particular foods, often triggered by emotions, habits, or reward-seeking. Mounjaro reduces both by dampening the brain's food-focused signalling.
How quickly does Mounjaro reduce food noise?
Many users report noticing a reduction in food noise within 1–2 weeks of starting Mounjaro, though some take longer. The effect typically becomes more pronounced as you increase doses over the first 16–20 weeks. Individual responses vary based on starting dose, dose escalation, and personal brain chemistry.
Can you experience food noise reduction without weight loss?
Yes. Some people notice a significant reduction in food noise and mental ease around food before seeing weight loss on the scales. This is because appetite regulation and weight loss are separate processes — reduced food noise doesn't always translate immediately to weight loss if calorie intake hasn't decreased enough.
Does food noise return if you stop taking Mounjaro?
For most users, food noise gradually returns after stopping Mounjaro, as GLP-1 and GIP signalling normalises. This is why weight management strategies — diet, exercise, and potentially continued medication — are important for maintaining results long-term.
Is food noise reduction the same as the tirzepatide dose you're on?
Not necessarily. Food noise reduction doesn't always correlate directly with dose. Some people notice significant reduction at lower doses (5–7.5 mg), while others need higher doses (10–15 mg). Your prescriber can adjust your dose based on appetite suppression and side effect tolerance, not just weight loss.
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.