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 Maqui Berry Help With Weight Loss?
Maqui berry is a South American superfruit often marketed as a weight loss aid, but scientific evidence for its effectiveness in human weight loss is very limited. Whilst maqui berries contain antioxidants and may have some health benefits, there is no robust clinical evidence that they promote significant weight loss in UK adults. If you're interested in weight management in the UK, more established approaches — including lifestyle changes and, where appropriate, prescription weight loss medication — have stronger evidence behind them. This guide explains what the research shows about maqui berry and what actually works for sustainable 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 Does the Research Say About Maqui Berry?
Maqui berries are rich in anthocyanins and polyphenols, plant compounds with antioxidant properties. These may theoretically support metabolism, but human weight loss studies on maqui berry are extremely limited. Most available research involves small animal studies or test-tube experiments — not real-world human trials. A few small human studies have suggested maqui berry may have modest effects on metabolic markers, but none have demonstrated significant or clinically meaningful weight loss in adults.
Why the hype? Maqui berry is marketed as a "superfruit" due to its high antioxidant content, but antioxidants alone do not clinically studied weight loss. Simply consuming antioxidant-rich foods without addressing overall calorie intake, physical activity, and lifestyle will not produce meaningful weight loss. The marketing claims often outpace the actual scientific evidence.
For sustainable weight loss in the UK, the NHS recommends approaches with proven effectiveness: creating a calorie deficit through balanced diet, increasing physical activity, and behavioural support where needed.
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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.
Effective Weight Loss Approaches With Evidence Behind Them
If you're pursuing weight loss in the UK, focus on methods with strong clinical evidence. A calorie deficit of approximately 500 kcal per day typically supports weight loss of around 0.5 kg per week — the NHS-recommended safe rate. The NHS weight management pathway includes tier 1 self-help and digital tools, tier 2 primary care-based support, and tier 3 specialist services where prescription weight loss medication may be appropriate.
For adults with a BMI of 30 or above, or BMI of 27–29.9 with weight-related health conditions, GLP-1 weight loss injections such as Mounjaro or Wegovy may be prescribed following clinical assessment. These medications have undergone rigorous clinical trials with documented weight loss results. Use our free BMI calculator to check your current status, and speak with your GP about the right approach for you.
- 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 maqui berry scientifically proven for weight loss?
No. While maqui berry contains antioxidants, human clinical trials supporting significant weight loss are essentially non-existent. Most research is limited to laboratory or animal studies. Marketing claims significantly outpace actual scientific evidence. For proven weight loss results, the NHS recommends calorie deficit, physical activity, and behavioural support.
Can antioxidant-rich foods like maqui berry help me lose weight?
Antioxidants support overall health and may reduce inflammation, but antioxidants alone do not cause weight loss. Weight loss requires a calorie deficit — eating fewer calories than you burn. You can obtain antioxidants from many common UK foods including berries, leafy greens, and vegetables whilst maintaining a healthy calorie intake. Our weight loss calculator can help you plan sustainable progress.
What weight loss methods actually have evidence in the UK?
The NHS supports calorie deficit (approximately 500 kcal/day for ~0.5 kg/week loss), increased physical activity, and behavioural strategies. For eligible adults, prescription weight loss medications such as GLP-1 injections (Mounjaro, Wegovy) have undergone clinical trials demonstrating effectiveness. Use our BMI calculator to check your eligibility, then speak with your GP about the right approach.
Should I try maqui berry supplements for weight loss?
There is no clinical evidence that maqui berry supplements promote weight loss. They may offer antioxidant benefits as part of a healthy diet, but they are not a weight loss tool. Focus your efforts on proven approaches: calorie deficit, physical activity, and where needed, prescription medication following GP assessment. Supplements marketed for weight loss often lack rigorous evidence.
What's the difference between maqui berry and actual weight loss treatment?
Maqui berry is a food with limited evidence for weight loss. Actual weight loss treatments — including GLP-1 injections and structured NHS programmes — have undergone clinical trials, documented safety profiles, and proven results. Prescription medications require clinical assessment to ensure they're appropriate for you. Your GP can discuss evidence-based options tailored to your health.
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.