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
Is Popcorn Ok For Weight Loss?
Yes, popcorn can be part of a weight loss plan — it's low in calories when prepared without butter or excessive salt. A typical serving of air-popped popcorn contains only around 30 calories per cup, making it a good snack choice for weight management in the UK. However, portion control matters, as does the preparation method. For those considering prescription weight loss medication as part of their UK weight management plan, understanding how different foods fit into your calorie intake is important.
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.
Popcorn And Weight Loss — What You Need To Know
Air-popped popcorn is the best choice for weight loss. One cup contains approximately 30 calories, compared to buttered cinema popcorn which can contain 150+ calories per cup. Popcorn is a whole grain and provides fibre, which helps you feel fuller for longer — useful when managing food intake for weight loss in the UK.
- Plain air-popped popcorn: ~30 calories per cup
- Lightly salted popcorn: ~40 calories per cup
- Buttered or caramel popcorn: 150–200+ calories per cup
The key to including popcorn in weight loss is preparation and portion control. Use our free progress tracker to log snacks like popcorn and monitor your daily calorie intake. For adults considering prescription weight loss medication — such as those exploring weight management options through the NHS — understanding portion sizes and food choices works alongside medication to support sustainable results.
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.
Prescription Weight Loss Support Available In The UK
If you're trying to lose weight in the UK, prescription weight loss medications are now available through both NHS specialist services and private prescribing. Options include Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide) — all licensed for adults with a BMI of 30 or above, or 27 or above with weight-related health conditions.
These medications work best alongside dietary changes (like choosing air-popped popcorn over buttered versions) and increased physical activity. Try our GLP-1 weight loss calculator to see how prescription weight loss medication might support your goals. Your GP can discuss whether you're eligible or refer you to an NHS specialist weight management service in your area.
- 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.
Can I eat popcorn every day while losing weight?
Yes, air-popped popcorn can be eaten daily as part of a calorie-controlled diet. Aim for 2–3 cups per day (around 90 calories) and count it within your daily calorie target. Consistency with portion control is key to sustainable weight loss.
How does popcorn fit into prescription weight loss medication?
When taking medications like Mounjaro or Wegovy for weight loss in the UK, popcorn is a sensible snack choice due to its low calorie density. However, these medications often reduce appetite naturally, so portion sizes may feel smaller than before.
What's the best way to prepare popcorn for weight loss?
Air-pop popcorn using a popcorn maker or microwave popper — no oil needed. Season with salt, herbs, or spices instead of butter or oil. Avoid cinema popcorn and pre-packaged buttered varieties, which contain 5–10 times more calories.
Does popcorn count towards my daily calorie intake?
Yes, all food and drink counts towards your daily calorie intake. Air-popped popcorn is calorie-light, so it's easier to include in a calorie deficit. Use our BMI calculator and progress tracker to understand your personal weight management targets.
Should I speak to my GP about weight loss medication?
Yes, contact your GP if you're interested in prescription weight loss options. They can assess your BMI and health, discuss eligibility, and refer you to NHS specialist services or recommend private prescribing options available in the UK.
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.