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
Can 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 some beneficial nutrients, coconut water alone won't help you lose weight. Sustainable weight loss requires a calorie deficit, which you can track using our free BMI calculator and progress tracker. Understanding what actually works — from dietary changes to prescription weight loss options available through NHS weight management services — is far more important than relying on any single drink or supplement.
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.
What Does the Evidence Actually Show?
Coconut water is lower in calories than many soft drinks (around 9 kcal per 100ml), but it's not significantly different from other low-calorie beverages like water or unsweetened tea. The research on coconut water and weight loss is minimal — there are no major clinical trials showing it promotes weight loss beyond what you'd achieve through general calorie reduction. Some studies suggest coconut water may have a slight appetite-suppressing effect due to its electrolyte content, but these effects are modest at best. For meaningful, sustainable weight loss through nhs weight loss services or prescription weight loss medication, you need strategies backed by robust evidence. Calculate your current BMI and healthy weight range using our free BMI calculator to understand where you stand, then explore evidence-based approaches like reduced-calorie diets, increased physical activity, and where appropriate, prescription options.
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.
Effective Weight Management Strategies That Work
If you're looking to lose weight effectively, focus on proven methods rather than individual foods or drinks. A calorie deficit of around 500 kcal per day typically results in a loss of approximately 0.5 kg per week — this is what NHS guidance recommends for sustainable results. For some people, prescription weight loss medication may be appropriate. GLP-1 weight loss injections like Wegovy (semaglutide) and Mounjaro (tirzepatide) are available through NHS specialist services or private prescribing, and clinical trials showed they support significant weight loss when combined with dietary changes. Track your progress using our free weight loss calculator and progress tracker. Always consult your GP about the best approach for your individual circumstances — whether that's lifestyle changes alone or support with prescription medication.
- 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 better than water for weight loss?
No — water is the best choice. Coconut water contains more calories and sugars than plain water, so it offers no advantage for weight loss. For hydration and weight management, water is ideal and completely free of calories.
Does coconut water speed up metabolism?
There's no reliable evidence that coconut water boosts metabolism. While it contains some electrolytes and nutrients, these don't significantly increase calorie burn. Weight loss depends on creating a calorie deficit through diet and activity, not on metabolism-boosting drinks.
Can I drink coconut water while using Wegovy or Mounjaro?
Yes, coconut water is safe to consume while using prescription weight loss medication. However, remember that GLP-1 injections work best alongside a reduced-calorie diet and increased physical activity — coconut water itself won't enhance results. Focus on overall calorie intake rather than individual beverages.
What's the most effective way to lose weight in the UK?
Effective weight loss combines: a calorie deficit (around 500 kcal/day for sustainable loss), increased physical activity, and behaviour change support. For some people, NHS weight management services or prescription weight loss medication may be appropriate. Use our free weight loss calculator to estimate potential results with different approaches.
How much weight can I expect to lose with lifestyle changes alone?
Most people lose 0.5–1 kg per week with a consistent 500 kcal daily deficit — this is the NHS-recommended safe rate. Individual results vary based on starting weight, age, metabolism, and adherence. Faster loss is possible with medical support, but may increase muscle loss risk.
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.