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 Chia Water Really Help With Weight Loss?
Chia water — seeds soaked in water — is often promoted as a natural weight loss aid, but the evidence is limited. Whilst chia seeds are nutritious and contain fibre and protein, the idea that chia water alone causes significant weight loss is not supported by robust clinical trials. For sustainable weight management in the UK, evidence-based approaches like calorie reduction, increased physical activity, and (where appropriate) prescription medication work more reliably. This guide explains what chia seeds actually do, separates fact from marketing hype, and explores proven weight loss strategies.
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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 Chia Water Actually Do?
Chia seeds are high in soluble fibre, protein, and omega-3 fatty acids, which may offer some modest benefits for weight management. When soaked in water, they absorb liquid and expand, potentially creating a feeling of fullness. This could theoretically help reduce appetite slightly. However, the effect is usually minimal — far smaller than marketing claims suggest.
- Chia seeds contain approximately 10g of fibre per 28g serving, which supports digestive health and may help stabilise blood sugar
- The protein content (around 4g per 28g) provides some satiety, but not as much as eating actual protein-rich foods
- Studies on chia seeds and weight loss show only small, inconsistent results — not the dramatic changes some retailers claim
- Chia water is low in calories (around 50 kcal per serving) but also provides minimal nutritional density compared to whole foods
The NHS emphasises that sustainable weight loss requires a calorie deficit alongside behavioural change — not single "super foods" or supplements.
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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.
Proven Weight Management Strategies That Actually Work
If you're interested in weight management in the UK, evidence shows that calorie reduction, increased physical activity, and behavioural support deliver results. The NHS recommends losing weight at a rate of 0.5–1 kg per week for sustainable outcomes. Use our free BMI calculator above to understand your current weight category, and our weight converter to track your measurements in both kg and stone.
For adults with a BMI of 30 or above — or 27 or above with weight-related health conditions like type 2 diabetes — prescription weight loss medication may be appropriate. GLP-1 medications like Wegovy (semaglutide) and Mounjaro (tirzepatide) have robust clinical trial evidence showing average weight loss of 15–21% of body weight. These are prescription-only and require clinical assessment from your GP or a licensed prescriber. Try our free GLP-1 weight loss calculator to explore potential outcomes with medical support.
- 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 chia water a effective weight loss solution?
No. Whilst chia seeds are nutritious and contain fibre and protein, chia water alone will not cause significant weight loss. Marketing often overstates the benefits. Sustainable weight loss requires a calorie deficit, increased physical activity, and behavioural change — not single foods or supplements.
Can chia water suppress appetite?
Chia seeds absorb liquid and expand, which may create a mild feeling of fullness. However, this effect is modest and much smaller than the effect of eating actual protein-rich foods or vegetables. For meaningful appetite suppression, GLP-1 medications like Wegovy have strong clinical evidence.
How much weight can I lose with chia water?
On its own, chia water is unlikely to cause measurable weight loss. Weight loss requires a sustained calorie deficit of around 500 kcal per day to lose approximately 0.5 kg per week, according to NHS guidance. Chia water alone cannot create this deficit.
What's the difference between chia water and actual weight loss medication?
Chia water is a food with modest nutritional benefits. Weight loss medications like Wegovy (semaglutide) and Mounjaro (tirzepatide) are prescription-only drugs with clinical trial evidence showing 15–21% average body weight loss alongside diet and exercise. Only medications prescribed following clinical assessment offer significant, measured outcomes.
Should I try chia water if I'm trying to lose weight?
Chia seeds can be part of a healthy diet for their fibre and nutrients, but shouldn't be relied upon for weight loss. Focus instead on sustainable calorie reduction, increased physical activity, and speaking to your GP about your weight goals. If you meet NHS criteria, prescription weight loss medication may be appropriate alongside lifestyle changes.
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.