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
Is Creatine Good For Weight Loss?
Creatine is primarily a muscle-building supplement, not a weight loss tool. While it may indirectly support your fitness goals, creatine itself doesn't burn fat or reduce overall body weight. In fact, it often increases water retention, which can temporarily add a few pounds on the scales. For effective weight management in the UK, evidence-based approaches like calorie deficit, increased physical activity, and prescription weight loss medication (where eligible) are far more effective than creatine supplementation alone.
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.
How Creatine Works in the Body
Creatine is an amino acid compound that increases adenosine triphosphate (ATP) production in muscle cells, helping muscles contract more powerfully. This allows you to perform more repetitions or lift heavier weights during resistance training, which can build muscle mass over time.
- Increased water retention: Creatine draws water into muscle cells, which is why users often gain 1–3 kg in the first week — this is water weight, not fat loss
- Muscle gain potential: More intense workouts can lead to increased lean muscle mass, which has a higher metabolic rate than fat tissue
- No direct fat-burning effect: Creatine doesn't directly target body fat or increase calorie expenditure
While muscle tissue does burn more calories at rest, creatine supplementation is not a replacement for the calorie deficit required for actual weight loss. To check your personal weight status and set realistic targets, use our free BMI calculator above to understand where you currently stand according to NHS guidelines.
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.
Effective Weight Loss Strategies vs Creatine
For sustainable weight management in the UK, the NHS recommends a calorie deficit of approximately 500 kcal per day, which typically results in losing 0.5–1 kg per week. This requires dietary changes and increased physical activity — far more impactful than any supplement.
For adults with a BMI of 30 or above, or 27 or above with weight-related health conditions, prescription weight loss medication may be appropriate. Our GLP-1 weight loss calculator can help you explore potential outcomes with evidence-based medication support. Creatine is best viewed as a performance aid for muscle building within a structured training programme, not as a weight loss tool. Always consult your GP before starting any new supplement or weight management plan.
- 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 creatine help you lose weight?
No. Creatine doesn't directly burn fat or aid weight loss. It may cause temporary weight gain due to water retention in muscles. For actual fat loss, you need a calorie deficit through diet and exercise. Prescription medications like GLP-1 injections are evidence-based options for weight management if you meet NHS eligibility criteria.
Will creatine make me gain weight?
Yes, initially — typically 1–3 kg in the first week due to increased water in muscles. This isn't fat gain. Beyond water retention, creatine won't cause additional weight gain unless your overall calorie intake increases. If you're tracking weight loss, don't be alarmed by initial scale increases when starting creatine.
Can creatine help with weight loss through muscle building?
Indirectly, perhaps. Building muscle increases resting metabolic rate slightly, so more lean mass can support long-term weight management. However, this effect is modest — roughly 6 kcal per kg of muscle per day. You still need a calorie deficit and regular exercise. Creatine is a tool for training performance, not weight loss.
Is creatine safe for weight loss?
Creatine is safe for most people when used as directed (3–5g daily). It's not dangerous, but it's not designed for weight loss. Ensure you stay well-hydrated, as creatine increases water needs. Always speak to your GP before taking supplements, especially if you have kidney concerns or take medications.
What's more effective — creatine or prescription weight loss medication?
For actual weight loss, prescription GLP-1 medications like Wegovy or Mounjaro have strong clinical evidence — clinical trials showed average weight losses of 15–21% body weight. Creatine has no direct weight loss effect. Prescription medications require clinical assessment and are only available through NHS specialist services or private prescribing, not as over-the-counter supplements.
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.