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 Ashwagandha Cause Weight Loss?
Ashwagandha is an ancient herbal supplement that has gained popularity for its potential health benefits, but the evidence for weight loss is limited. While some studies suggest ashwagandha may help reduce stress and improve sleep — both of which can indirectly support weight management — there is no strong scientific evidence that ashwagandha directly causes weight loss. If you're interested in evidence-based weight management in the UK, our free BMI calculator can help you establish your current health baseline, and your GP can discuss the most suitable approaches for your needs.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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 Does the Science Say About Ashwagandha and Weight Loss?
Research into ashwagandha's effects on weight is limited and inconclusive. Some small clinical studies have found modest reductions in cortisol (a stress hormone) after ashwagandha use, which theoretically could support weight management by reducing stress-related eating. However, the direct evidence for ashwagandha causing weight loss is weak. A 2019 review of multiple studies concluded that whilst ashwagandha may help reduce stress and anxiety, there is insufficient evidence to recommend it specifically for weight loss.
- Stress reduction: Ashwagandha may help lower cortisol levels, which could indirectly reduce emotional eating and support better eating habits
- Sleep improvement: Some evidence suggests ashwagandha may improve sleep quality, and poor sleep is linked to weight gain
- Limited direct effect: No robust clinical trials demonstrate that ashwagandha alone causes significant weight loss
For clinically proven weight loss support in the UK, prescription weight loss medications and structured weight management approaches have much stronger evidence bases than herbal supplements alone.
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.
Prescription Weight Loss vs. Herbal Supplements — What Works?
If you're seeking effective weight management in the UK, prescription weight loss medications have strong clinical evidence. GLP-1 medications like semaglutide (Wegovy) and tirzepatide (Mounjaro) are licensed by the MHRA for weight management and show average weight losses of 15–21% of body weight in clinical trials — far more significant than herbal supplements. These medications require a prescription and clinical assessment from a healthcare professional. Our GLP-1 weight loss calculator can help you explore potential outcomes with different doses. Alongside medication or herbal approaches, sustainable weight loss combines reduced-calorie diet, increased physical activity, and behaviour change, with support from your GP or a weight management specialist through the NHS weight management pathway.
- 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 ashwagandha actually help you lose weight?
Limited evidence suggests ashwagandha may help reduce stress and improve sleep, both of which can indirectly support weight management. However, there is no strong scientific evidence that ashwagandha directly causes weight loss. If you're seeking evidence-based weight loss support, speak with your GP about prescription options or NHS weight management services.
Is ashwagandha safe to take for weight loss?
Ashwagandha is generally considered safe for most adults at recommended doses, though it can interact with some medications and may not be suitable during pregnancy. It is not regulated as strictly as prescription medicines. Always inform your GP if you're taking ashwagandha alongside any other medications or health conditions.
What is a more effective weight loss approach than ashwagandha?
Prescription weight loss medications like Wegovy (semaglutide) and Mounjaro (tirzepatide) have robust clinical evidence showing 15–21% average weight loss. These require clinical assessment and a prescription. Alternatively, the NHS offers structured weight management programmes combining dietary changes, physical activity, and behavioural support through your GP.
Can I use ashwagandha alongside prescription weight loss medication?
You should not combine ashwagandha with prescription weight loss medications without explicit guidance from your GP or prescriber, as potential interactions are not fully understood. Always disclose all supplements you're taking when discussing weight management options with your healthcare provider.
What does NHS weight loss guidance recommend?
The NHS recommends losing weight at a rate of 0.5–1 kg per week through a combination of reduced-calorie diet and increased physical activity. For adults with a BMI of 30 or above (or 27+ with weight-related health conditions), prescription weight loss medication may be offered through specialist tier 3 services alongside lifestyle changes. Use our free BMI calculator to check your current BMI and discuss options with your GP.
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.