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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Does Celery Really Help With Weight Loss?
Celery is often promoted as a weight loss food, but does the science support the hype? Celery is very low in calories — just 16 kcal per 100g — and high in water and fibre, which may help you feel fuller for longer. However, eating celery alone won't create the calorie deficit needed for sustainable weight loss. Weight loss requires a combination of dietary changes, increased physical activity, and sometimes prescription weight loss medication. This guide explains how celery fits into a healthy weight management plan in the UK, and when professional support might help.
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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.
Why Celery Has a "Weight Loss" Reputation
Celery has become synonymous with dieting, largely because it's extremely low in calories and has a high water content (around 95%). Some sources claim celery has "negative calories" — meaning your body burns more energy digesting it than the celery itself contains — but this is largely a myth. Celery does contain fibre, which can support satiety and digestive health. A 100g serving of raw celery provides only 16 kcal and 1.7g of fibre, making it genuinely nutrient-dense and filling relative to its calorie content. However, the NHS emphasises that weight loss requires a consistent calorie deficit alongside increased physical activity. Eating celery alone, without addressing overall calorie intake, will not result in meaningful weight loss. Celery works best as part of a broader, balanced approach to weight management UK adults can follow.
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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.
Building a Sustainable Weight Management Plan
Sustainable weight loss typically occurs at a rate of 0.5 to 1 kg per week, achieved through a calorie deficit of around 500 kcal per day. Celery can support this as a low-calorie, filling food — but it's just one component. Include celery in balanced meals with lean protein, whole grains, and healthy fats. The NHS Weight Loss Plan provides structured guidance, and for some people, prescription weight loss medication such as GLP-1 injections may be recommended. Use our free BMI calculator to check your current health status, and try our GLP-1 weight loss calculator to explore options if you're eligible for prescription support. Track your progress consistently — our free progress tracker helps you monitor weight changes over time.
- 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 celery a negative-calorie food?
No. While celery is extremely low in calories (16 kcal per 100g), the "negative calorie" claim is a myth. Your body doesn't burn more energy digesting celery than the celery itself provides. However, celery is genuinely filling due to its water and fibre content, which can help with satiety and support a calorie deficit when part of a balanced diet.
Can eating celery alone lead to weight loss?
No. Eating celery without addressing overall calorie intake and physical activity won't produce meaningful weight loss. Weight loss requires a consistent calorie deficit across your entire diet. Celery is best used as part of a larger weight management plan that includes balanced nutrition and regular exercise.
How does celery compare to prescription weight loss medication?
Celery is a food with minimal calories and good nutritional value, while prescription GLP-1 medications like Wegovy or Mounjaro are prescription-only medicines that work through hormonal pathways to reduce appetite. Medications are not replacements for dietary changes — they work alongside reduced-calorie eating and increased activity. Your GP can assess whether prescription medication is appropriate for you.
What does the NHS say about celery and weight loss?
The NHS emphasises that sustainable weight loss (0.5–1 kg per week) requires a calorie deficit and regular physical activity. Celery is a nutritious, low-calorie food that can support a balanced diet, but it's not a weight loss solution on its own. The NHS Weight Loss Plan provides structured guidance aligned with this evidence-based approach.
What's the best way to include celery in a weight loss plan?
Use celery as a low-calorie base in meals: raw in salads, in vegetable stews, as a side to lean protein, or in juices (though whole celery retains more fibre). Pair it with nutrient-dense foods like chicken, fish, beans, and whole grains to create balanced, satisfying meals that support a calorie deficit and sustainable weight management.
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.