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
Fat Face Weight Loss — What You Need to Know
Weight loss can affect facial appearance, including the face and cheeks, as the body loses fat from all areas including the face. This is a natural part of weight reduction. If you're concerned about facial fullness and considering weight management, understanding how weight loss works—and what options are available in the UK—can help you make an informed decision about your health journey.
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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 Affects Facial Appearance
When you lose weight, your body draws energy from fat stores across your entire frame, including the face and neck area. This happens because fat distribution is determined by genetics—you cannot target fat loss from specific areas. As you create a calorie deficit through diet and activity, your body gradually reduces overall fat, which naturally results in a slimmer facial appearance, more defined cheekbones, and a sharper jawline over time.
- Fat in the face is usually among the first areas to show visible weight loss
- Facial changes typically become noticeable after losing 5-10% of body weight
- The rate of facial fat loss varies depending on genetics, age, and starting weight
- Skin elasticity affects how the face appears as fat reduces—younger skin typically adapts better
The NHS recommends losing weight at a sustainable rate of 0.5 to 1 kg per week for long-term results. Faster weight loss may lead to loose skin, whereas gradual loss allows skin to adapt naturally.
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 Management Options Available in the UK
If you're interested in weight management, the UK offers several evidence-based approaches. NHS weight loss services provide free support through tier 1 community programmes, and prescription weight loss medication may be available through specialist tier 3 services if you meet eligibility criteria. GLP-1 weight loss medications such as Wegovy (semaglutide) may help some adults lose weight when combined with diet and exercise changes.
Prescription weight loss options require a clinical assessment to determine suitability. Try our free BMI calculator and GLP-1 weight loss calculator to explore whether prescription weight management might be relevant for your situation. Your GP can also discuss whether NHS specialist services or private options are appropriate 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.
Will my face get slimmer if I lose weight?
Yes, facial fat loss is a natural part of overall weight reduction. Most people notice their face becoming slimmer after losing 5-10% of body weight. The rate varies by genetics and age, but changes typically become visible within a few months of consistent weight loss.
Can I lose fat from just my face?
No—you cannot target fat loss from specific areas. When you lose weight, your body reduces fat from all areas, including the face. Fat distribution is determined by genetics, so the order and pace of facial fat loss varies between individuals.
Does weight loss cause loose skin on the face?
Gradual weight loss (0.5-1 kg per week) typically allows skin to adapt naturally, minimising loose skin. gradual weight management may result in looser skin temporarily, though it often improves over time as skin elasticity recovers, particularly in younger people.
What weight loss options are available on the NHS in the UK?
The NHS offers free weight management programmes through community services (tier 1) and primary care. Specialist services (tier 3) may provide prescription weight loss medication if you meet eligibility criteria (BMI 30+ or 27+ with health conditions). Your GP can refer you.
Are prescription weight loss injections available in the UK?
Yes. GLP-1 medications like Wegovy (semaglutide) are prescription-only and licensed in the UK for weight management. They require a clinical assessment and are available through NHS specialist services or private prescribing. Results vary—clinical trials showed average weight loss of around 15% body weight when combined with lifestyle changes.
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.