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
Do Weight Loss Gummies Actually Work?
Weight loss gummies are widely promoted online as an easy alternative to diet and exercise, but evidence for their effectiveness is limited. Unlike prescription weight loss medications such as GLP-1 injections, most gummies lack rigorous clinical trial data. This guide explains what weight loss gummies contain, whether they work, and what evidence-based alternatives are available for UK adults seeking genuine weight management support.
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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's Actually in Weight Loss Gummies?
Most commercial weight loss gummies contain ingredients such as glucomannan (a soluble fibre), green tea extract, caffeine, or various plant compounds claimed to boost metabolism. Some brands add B vitamins or chromium. However, the doses used in gummies are typically much lower than those in clinical studies, and the evidence for weight loss effectiveness at these doses is weak.
- Glucomannan may promote satiety when consumed with adequate water, but alone it is not proven to cause significant weight loss
- Green tea extract studies show modest effects (around 1.3 kg average loss) — much smaller than prescription weight loss medication
- Caffeine can slightly increase energy expenditure but does not produce meaningful weight loss on its own
- Most gummies are not regulated as medicines — they are classified as food supplements in the UK, meaning they do not require the same evidence standards as prescription medications
The appeal of gummies is convenience and perceived safety, but convenience without evidence of effectiveness is not helpful for genuine weight management.
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.
How Gummies Compare to Prescription Weight Loss Options
Unlike weight loss gummies, prescription weight loss medications such as Mounjaro and Wegovy have passed rigorous clinical trials. Wegovy (semaglutide) is a GLP-1 injection licensed for weight management in UK adults, with evidence showing average weight loss of around 15% of body weight in clinical trials. Mounjaro (tirzepatide) is a dual GIP/GLP-1 injection showing average weight loss of 15–21%. Both require clinical assessment and a prescription.
For genuine weight loss support, evidence-based approaches include lifestyle changes (diet and exercise), medical supervision through NHS weight management services, or prescription medications where clinically appropriate. Use our GLP-1 weight loss calculator to explore realistic expectations with proven treatment options, and our BMI calculator to determine your current health status.
- 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 weight loss gummies approved by the NHS?
No. Weight loss gummies are not approved or recommended by the NHS for weight management. The NHS recommends a combination of calorie deficit, physical activity, and — where appropriate — prescription medications such as GLP-1 injections that have clinical trial evidence. Gummies lack the rigorous testing required for NHS endorsement.
Do weight loss gummies actually suppress appetite?
Most weight loss gummies have not demonstrated meaningful appetite suppression in clinical trials at their typical doses. Some ingredients like glucomannan may slightly increase fullness when paired with water, but the effect is small. Prescription GLP-1 medications work directly on appetite-regulating hormones and show measurable appetite reduction in studies.
What's the difference between gummies and prescription weight loss injections?
Prescription injections like Wegovy contain active pharmaceutical ingredients (semaglutide or tirzepatide) tested in large clinical trials showing significant, measurable weight loss. Gummies are food supplements with limited evidence at the doses used. Injections require a prescription and clinical assessment; gummies do not. Results with injections are much more substantial.
Can I buy weight loss gummies on the NHS?
No. The NHS does not prescribe weight loss gummies. For NHS weight management support, your GP can refer you to specialist tier 3 services where options may include prescription medications, dietary guidance, and behaviour change support. Private gummies are available online but lack clinical backing.
What should I do instead of buying weight loss gummies?
For genuine weight loss, calculate your BMI using our free BMI calculator, aim for a calorie deficit of approximately 500 kcal per day (resulting in around 0.5 kg weekly loss), and increase physical activity. If you need additional support, speak to your GP about NHS weight management services or eligibility for prescription weight loss medication. Track your progress with our free progress tracker.
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.