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 Linseed Help With Weight Loss?
Linseed (also called flaxseed) is often promoted as a weight loss aid, but the evidence is modest. It's high in soluble fibre and omega-3 fatty acids, which may help you feel fuller for longer and support digestive health. However, linseed alone won't cause weight loss — it works best as part of a balanced diet and increased physical activity. For most people, sustainable weight management requires a calorie deficit and lifestyle changes. If you're struggling to lose weight, your GP can discuss options including NHS weight loss programmes and, if eligible, prescription weight management medication.
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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.
How Linseed May Support Weight Management
Linseed contains soluble fibre, which absorbs water and forms a gel in your digestive system. This may help slow digestion, reduce hunger, and increase feelings of fullness — all potentially useful for weight management. Linseed also contains lignans and omega-3 fatty acids, which support overall health and may help reduce inflammation.
A typical serving is 1–2 tablespoons of ground linseed per day, mixed into yoghurt, porridge, smoothies, or water. Ground linseed is more effective than whole seeds because your body can absorb the nutrients better.
- May increase satiety (feeling full)
- Supports digestive health and regularity
- High in plant-based omega-3s
- Low in calories (~55 kcal per tablespoon)
However, evidence shows linseed produces only modest weight loss when used alone — typically less than 1 kg over 12 weeks in clinical studies. It's a helpful addition to a weight management strategy, not a standalone solution.
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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.
Linseed vs. Prescription Weight Loss Options
If linseed and lifestyle changes alone aren't producing results, your GP can refer you to a specialist weight management service or discuss prescription options. Medications like GLP-1 weight loss injections (including Mounjaro and Wegovy) have much stronger evidence for significant weight loss — clinical trials show 15–21% average weight loss over several months, depending on the medication and dose.
Prescription weight loss medication is available through the NHS for eligible adults (BMI 30 or above, or 27+ with weight-related health conditions). Our GLP-1 weight loss calculator can help you understand potential outcomes if you're eligible. Always discuss all options with your GP to find the best approach for your individual needs.
- 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.
Does linseed actually help you lose weight?
Linseed may help modestly by increasing fibre intake and promoting fullness, but it's not a weight loss medication. Studies show modest results (typically under 1 kg loss over 12 weeks). Weight loss requires a calorie deficit. Linseed works best as part of a balanced diet, not as a standalone solution.
How much linseed should I take daily for weight loss?
A typical dose is 1–2 tablespoons of ground linseed daily, mixed into food or drinks. Ground linseed is more effective than whole seeds. Start with 1 tablespoon and increase gradually to avoid digestive discomfort. Drink plenty of water, as the fibre needs water to work effectively.
Can I use linseed instead of weight loss medication?
Linseed can support healthy eating habits but won't replace prescription weight loss medication if you're eligible. If lifestyle changes and dietary additions aren't working, speak to your GP about options like NHS weight management services or prescription GLP-1 medications, which have much stronger evidence for weight loss.
Is linseed safe to take every day?
Yes, linseed is safe for most people when taken daily in moderate amounts (1–2 tablespoons). However, if you take blood thinners or have digestive conditions, check with your GP first. Drink plenty of water and introduce linseed gradually to avoid bloating or cramping.
What's the difference between linseed and other weight loss supplements?
Linseed is a whole food rich in fibre — it's not a drug or supplement. Most other "weight loss supplements" have weak evidence. Prescription medications like GLP-1 injections have strong clinical trial evidence. For sustainable weight management, focus on calorie deficit, whole foods like linseed, and physical activity first.
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.