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
Best Macros For Weight Loss Female
Getting the macro balance right is important for sustainable female weight loss, but nutrition alone isn't always enough. Whilst adjusting protein, carbohydrates, and fats can support your weight management journey, many women in the UK also benefit from additional support through lifestyle changes or, if eligible, prescription weight management options. Whether you're tracking macros or exploring all available approaches to weight loss in the UK, understanding what's available to you — including NHS-approved medication — can help you choose the right path for your health goals.
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.
UK Prescription Weight Management Options For Women
If you're struggling with weight management despite dietary changes, prescription weight loss medication may be available to you in the UK. Three GLP-1 and dual receptor agonist medications are currently licensed for weight management:
- Mounjaro (tirzepatide) — a once-weekly injection that activates two hormone pathways to support appetite regulation. Clinical trials showed women lost an average of 15–21% body weight alongside reduced-calorie diet and increased physical activity.
- Wegovy (semaglutide) — a once-weekly GLP-1 injection. Clinical evidence indicates average weight loss of around 15% body weight in trials.
- Saxenda (liraglutide) — a daily GLP-1 injection (older option, less commonly prescribed now).
You may be eligible if your BMI is 30 or above, or 27–29.9 with weight-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnoea. Individual results vary significantly. A prescriber will assess whether medication is right for you. Try our free GLP-1 weight loss calculator to explore potential outcomes at different doses.
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.
NHS Vs Private Weight Management — How To Get Started
In the UK, prescription weight loss medication is available through two routes. The NHS route involves a referral from your GP to a tier 3 specialist weight management service — though availability and waiting times vary significantly by region. Many areas have waiting lists of several months or longer.
The private route offers faster access through GPhC-registered online prescribing services. A UK-licensed prescriber assesses your eligibility following an online consultation, and medication is dispensed by a regulated pharmacy if approved.
Start by speaking to your GP about your weight loss goals and any underlying health conditions. Your GP can discuss medication eligibility, refer you to NHS services if appropriate, or advise on private options. Calculate your personal BMI using our free BMI calculator above to understand where you sit within NHS eligibility thresholds.
- 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.
What macros should I aim for as a woman trying to lose weight?
There's no one-size-fits-all macro ratio — it depends on your preferences and lifestyle. Many women find success with 30–40% protein, 30–40% carbohydrates, and 20–30% fat, as higher protein supports muscle retention during weight loss. However, the most important factor is maintaining a calorie deficit. Speak to a registered dietitian for personalised guidance based on your health, activity level, and preferences.
Can women take Mounjaro or Wegovy for weight loss in the UK?
Yes. Both Mounjaro and Wegovy are licensed for weight management in UK adults, including women. Eligibility is based on BMI (30 or above, or 27–29.9 with health conditions) and medical suitability. A prescriber will assess whether these medications are appropriate for you following a clinical assessment. Individual results vary.
How quickly will I lose weight on prescription medication?
Clinical trials show average weight loss of 15–21% over several months to a year, but individual results vary significantly. Weight loss typically begins within the first few weeks and continues as your dose increases. Results depend on dose, adherence, diet quality, physical activity, and individual metabolism. A prescriber can discuss realistic timelines with you.
Is weight loss medication available on the NHS for women?
Yes, but access is limited. Prescription weight loss medication is available through NHS tier 3 specialist weight management services following a GP referral. However, availability varies by region and waiting lists can be lengthy. Your GP can assess your eligibility and discuss whether NHS access or private prescribing is most suitable for you.
What's the difference between Mounjaro and Wegovy?
Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist with slightly higher average weight loss (15–21%) in trials. Wegovy (semaglutide) is a GLP-1-only medication with average weight loss around 15%. Both are once-weekly injections. Mounjaro uses lower starting doses but achieves higher maximum doses. Your prescriber will recommend the most suitable option based on your health profile and preferences.
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.