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
Does Coconut Water Help With Weight Loss?
Coconut water is often promoted as a weight loss aid, but the evidence for its effectiveness is limited. While it contains useful nutrients like electrolytes and potassium, coconut water is relatively high in natural sugars and calories — typically containing around 45–65 calories per 100ml depending on the brand. For sustainable weight management in the UK, the evidence supports calorie control, regular physical activity, and lifestyle changes as the foundation. If you're considering weight loss support, understanding the role of different foods and drinks is important alongside proven approaches like the ones we'll explore below.
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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.
What Does Coconut Water Actually Contain?
Coconut water is the clear liquid inside young coconuts, different from coconut milk (which is made from the flesh). A typical 250ml serving contains:
- Calories: Around 110–165 depending on brand and processing
- Carbohydrates: 9–12g, mainly natural sugars (glucose and fructose)
- Electrolytes: Potassium (around 600mg per 250ml), sodium, magnesium, and calcium
- Fibre: Minimal — usually less than 1g per serving
- Protein: Very low — less than 1g per serving
The electrolyte content makes coconut water popular with athletes for hydration after exercise. However, for weight management in the UK, the natural sugar content is significant. A 250ml serving contains roughly equivalent sugar to a small glass of juice — around 9–12g of natural sugars. This can contribute to overall calorie intake without providing the fullness or satiety that solid foods typically offer.
Clinically BackedWeight Loss
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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.
Weight Loss: What the Evidence Actually Shows
There is no high-quality clinical evidence that coconut water specifically promotes weight loss. While some studies suggest coconut water may support hydration and contain beneficial compounds, these findings don't translate to meaningful weight loss outcomes. For sustainable weight loss medication and approaches in the NHS, the focus is on evidence-backed methods: a consistent calorie deficit (typically 500 calories daily for around 0.5kg per week loss), increased physical activity, and behavioural support. Tools like our free BMI calculator and weight loss calculator can help you understand your current health status and explore options. If you're struggling with weight management, your GP can refer you to specialist weight loss services or discuss prescription options like GLP-1 weight loss medications if clinically appropriate.
- 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 coconut water lower in calories than other drinks?
Coconut water contains around 45–65 calories per 100ml, similar to diluted fruit juice. While lower than sugary fizzy drinks (typically 40–50 calories per 100ml in concentrate), it's higher in calories than water or unsweetened tea. For weight loss, water remains the best choice for hydration without calories.
Can coconut water help you feel fuller?
No — coconut water is a liquid and lacks the fibre and protein needed to create satiety. Solid foods like vegetables, lean proteins, and whole grains are far more effective at creating fullness and supporting appetite control during weight management.
What's the difference between coconut water and coconut milk?
Coconut water is the liquid inside young coconuts (lower fat, moderate calories). Coconut milk is made from the flesh (high in fat and calories — around 560 calories per 250ml). Both can fit into a balanced diet but aren't weight loss aids.
Should I avoid coconut water if I'm trying to lose weight?
Not necessarily — you can include coconut water in moderation as part of a balanced diet. The key to weight loss is overall calorie balance. If you enjoy it, include a small serving within your daily calorie target rather than eliminating it entirely.
What's more effective for weight loss — coconut water or prescription weight loss medication?
Prescription weight loss medications like GLP-1 injections (such as Wegovy or Mounjaro) have strong clinical evidence supporting significant weight loss when combined with lifestyle changes. Coconut water alone has no proven weight loss effect. Your GP can assess whether prescription options are appropriate for you through NHS specialist services.
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.