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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Will Chia Seeds Help With Weight Loss?
Chia seeds are often promoted as a weight loss aid because they're high in fibre and protein. While they can support a healthy diet, they're not a weight loss solution on their own. The evidence shows that sustainable weight management in the UK depends on creating a calorie deficit, increasing physical activity, and sometimes prescription medication. This guide explains what chia seeds can actually do, and what really works for effective weight loss.
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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.
What the Evidence Says About Chia Seeds
Chia seeds contain approximately 10g of fibre per 28g serving, which can help you feel fuller for longer and may reduce overall calorie intake. They're also a good source of protein and omega-3 fatty acids. However, research shows that chia seeds alone do not produce significant weight loss.
A 2019 clinical review found that whilst fibre-rich foods can modestly support weight management, they work best as part of a calorie-controlled diet alongside increased physical activity. The NHS emphasises that sustainable weight loss requires a consistent calorie deficit of approximately 500 kcal per day, which typically results in losing 0.5 to 1 kg per week.
Chia seeds can be a useful addition to a balanced diet — they add nutritional value and may help with satiety — but they cannot replace the fundamental principles of weight management that actually work: reduced-calorie eating and regular exercise.
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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.
Evidence-Based Weight Loss That Works
If you're looking for effective weight loss UK methods, the most reliable approaches supported by evidence include reducing calorie intake, increasing physical activity, and considering prescription weight loss medication if eligible. Our GLP-1 weight loss calculator can help you understand what evidence-based treatment options might achieve.
For adults with a BMI of 30 or above, or 27 and above with weight-related health conditions, prescription weight loss medications like GLP-1 injections may be recommended by your GP or through specialist weight management services. These are used alongside diet and exercise — not instead of them. Check your BMI using our free BMI calculator to see whether you might be eligible for prescription support.
Dietary approaches that work: A calorie deficit through whole foods (not supplements alone), Mediterranean-style eating patterns, and consistent physical activity are evidence-based. Prescription options: GLP-1 medications have strong clinical trial data showing average weight loss of 15–21% of body weight. Professional support: Your GP can advise on NHS weight loss services, or you can access private weight management consultations if you prefer faster access.
- 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.
Are chia seeds good for weight loss?
Chia seeds are nutritious and high in fibre, which may help you feel fuller longer. However, they're not a weight loss treatment on their own. They work best as part of a calorie-controlled diet alongside regular exercise. Evidence shows that sustainable weight loss requires a consistent calorie deficit, not individual foods.
How much weight can I lose with chia seeds?
Chia seeds alone won't produce measurable weight loss. Weight loss happens through creating a calorie deficit — typically 500 kcal per day results in approximately 0.5–1 kg per week lost. Chia seeds can contribute to this by increasing fibre intake and satiety, but they're one small part of a much larger picture.
What's the most effective way to lose weight in the UK?
The most effective approach combines a reduced-calorie diet, increased physical activity, and sometimes prescription medication. The NHS weight loss pathway includes tier 1 self-help, tier 2 primary care programmes, and tier 3 specialist services where prescription treatments may be offered. Your GP can advise which approach suits you best.
Are GLP-1 weight loss injections more effective than diet alone?
Clinical trials show that GLP-1 medications (like Wegovy, which contains semaglutide) produce average weight loss of approximately 15% of body weight when used alongside diet and exercise. They're prescription-only and require clinical assessment. They're particularly helpful for people with a BMI of 30 or above, or 27+ with weight-related health conditions.
How do I check if I'm eligible for weight loss medication in the UK?
Use our free BMI calculator to check your BMI. Adults with a BMI of 30 or above, or 27–29.9 with weight-related conditions like type 2 diabetes or hypertension, may be eligible. Your GP can refer you to NHS specialist weight management services, or you can access private consultations through UK-licensed prescribers for faster assessment.
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.