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
How Weight Loss Helps Reduce Blood Pressure
Weight loss is one of the most effective ways to lower blood pressure naturally. Even modest weight reduction of 5-10% can significantly improve hypertension in many UK adults. The relationship between excess weight and high blood pressure is well-established by the NHS and supported by clinical evidence. When you lose weight, your heart has to work less hard to pump blood around your body, reducing the pressure on your artery walls. This guide explains how weight management works, what the NHS recommends, and the options available — including prescription weight loss medication — to help you achieve and maintain a healthier weight and blood pressure.
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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 Weight Loss Lowers Blood Pressure
High blood pressure (hypertension) affects approximately 1 in 4 UK adults and significantly increases the risk of heart attack and stroke. Excess weight forces your heart to work harder, increasing the force of blood against artery walls. Losing weight reduces this strain.
NHS research shows that for every 1 kg of weight lost, systolic blood pressure (the top number) decreases by approximately 0.7 mmHg on average. This means losing 10 kg could reduce your blood pressure by around 7 mmHg — a clinically meaningful improvement.
- Reduced arterial stiffness: Weight loss improves how flexible your blood vessels are
- Better kidney function: Excess weight damages kidney function; weight loss helps restore it
- Lower sodium retention: Overweight individuals retain more salt; weight loss helps regulate this
- Improved insulin sensitivity: Weight loss helps your body regulate blood sugar, which affects blood pressure
The NHS recommends a weight loss of 0.5–1 kg per week as safe and sustainable for most adults with hypertension and excess weight.
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.
Weight Loss Methods and Blood Pressure Support
Sustainable weight loss for hypertension management involves both dietary changes and increased physical activity. The NHS Weight Loss Plan recommends a calorie deficit of around 500 kcal per day, typically resulting in approximately 0.5 kg weekly loss. Regular aerobic exercise — such as brisk walking, cycling, or swimming — directly lowers blood pressure independent of weight loss, making it essential alongside dietary changes.
For adults with a BMI of 30 or above, or 27–29.9 with weight-related health conditions including hypertension, prescription weight loss medication may be considered. GLP-1 weight loss injections, when combined with lifestyle changes, may help accelerate weight loss for NHS-eligible adults in England. These options are available through NHS specialist weight management services or private prescribing following clinical assessment. Use our free BMI calculator to check your starting point, and our GLP-1 weight loss calculator can help estimate potential outcomes at different doses.
- 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.
Can weight loss alone reduce blood pressure without medication?
Yes. The NHS confirms that weight loss of 5–10% can significantly lower blood pressure in many adults, often without needing additional medication. However, if you're already on blood pressure medication, always consult your GP before making changes — they may need to adjust your dose as your blood pressure improves.
How quickly does blood pressure improve after weight loss?
Some improvements can appear within weeks of starting weight loss, though the most significant reductions typically occur after 3–6 months of sustained weight loss. The rate depends on how much weight you lose and your individual health factors. Your GP can monitor your progress with regular checks.
Is prescription weight loss medication safe for people with high blood pressure?
GLP-1 weight loss injections have been studied in people with hypertension and are generally considered safe when prescribed by a qualified healthcare professional. However, individual assessment is essential. Always inform your prescriber about your blood pressure medication, as weight loss may eventually allow dose reductions.
What's the difference between weight loss through diet and weight loss medication?
Both can reduce blood pressure effectively. Medication may help some people lose weight faster when combined with dietary changes and exercise, but results vary individually. Lifestyle changes remain essential alongside any medication. Your GP or prescriber can advise which approach suits your circumstances.
How do I track whether my weight loss is reducing my blood pressure?
Ask your GP to monitor your blood pressure regularly — typically at check-ups every 2–4 weeks during active weight loss. Many GP surgeries offer free blood pressure checks. You can also track your weight progress using our free progress tracker to see the correlation between weight loss and any improvements your GP records.
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.