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 Inositol Help With Weight Loss?
Inositol is a naturally occurring compound that some people take as a supplement, hoping it might support weight loss. Whilst inositol does have a role in how your body manages blood sugar and insulin, the evidence for significant weight loss is limited. If you're exploring weight management options in the UK, this guide explains what inositol can and cannot do, and introduces prescription weight management options that have stronger clinical backing for eligible adults.
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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.
Inositol vs Prescription Weight Loss Options in the UK
Inositol is a naturally occurring carbohydrate found in foods like grains, nuts, and beans. Some research suggests it may help with insulin sensitivity, particularly in people with polycystic ovary syndrome (PCOS). However, the evidence for standalone weight loss is modest and inconsistent.
For genuine weight management in the UK, prescription GLP-1 medications have much stronger clinical evidence. Three prescription options are licensed in the UK: Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide). In clinical trials, these medications helped participants lose an average of 15–21% of their body weight when combined with dietary and lifestyle changes. Unlike supplements, prescription weight loss injections are specifically approved and regulated by the MHRA for weight management.
You can use our free BMI calculator above to check your personal BMI and understand your weight management starting point. For weight loss medication in the UK, eligibility generally requires a BMI of 30 or above, or 27 or above with weight-related health conditions such as type 2 diabetes or high blood pressure.
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 to Access Prescription Weight Loss in the UK
There are two routes to prescription weight loss medication in the UK: NHS specialist services and private prescribing.
- NHS route: Ask your GP for referral to a tier 3 specialist weight management service. Availability and waiting times vary significantly by region. Some areas have very long waiting lists.
- Private route: Online consultations with UK-licensed prescribers are available without NHS referral. Following a clinical assessment, eligible patients receive a prescription dispensed by a GPhC-registered pharmacy.
Before pursuing any weight loss medication, try our GLP-1 weight loss calculator to see projected weight loss outcomes at different doses. Start by speaking with your GP about your weight management goals—they can advise on NHS eligibility and discuss whether prescription medication is right 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.
Does inositol help with weight loss?
Inositol may support blood sugar regulation and insulin sensitivity, especially in people with PCOS. However, clinical evidence for significant weight loss is limited. It is not a prescription medication and is available over-the-counter as a supplement. For stronger evidence-based weight loss, prescription medications like Mounjaro or Wegovy are available in the UK for eligible adults.
What is the best prescription weight loss medication in the UK?
Three prescription options are licensed in the UK: Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide). Clinical trials show all three can support meaningful weight loss (15–21% average) when combined with lifestyle changes. The best option depends on your individual health profile, which a GP or prescriber can assess.
Am I eligible for prescription weight loss medication on the NHS?
NHS eligibility typically requires a BMI of 30 or above, or 27 or above with weight-related health conditions (such as type 2 diabetes, hypertension, or cardiovascular disease). Eligibility criteria may be lower for adults of South Asian, Chinese, Black African, or Black Caribbean heritage. Ask your GP for referral to a specialist weight management service in your area.
How long does it take to see weight loss results with prescription injections?
Weight loss typically becomes noticeable within 4–8 weeks of starting treatment, though individual results vary. Clinical trials measured significant weight loss over 68–72 weeks. Results depend on consistent medication use, adherence to a reduced-calorie diet, and increased physical activity. Track your progress with our free progress tracker.
What is the difference between Mounjaro and Wegovy for weight loss?
Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist, whilst Wegovy (semaglutide) is a GLP-1 agonist only. Clinical trials suggest Mounjaro may produce slightly greater average weight loss (up to 21% vs 15%). Both are once-weekly injections. Individual results vary, and a prescriber can help determine which is more suitable for you based on your health profile. ``` --- ## CONTENT NOTES FOR EDITOR: ✅ **Keyword integration:** Primary keyword "does inositol help with weight loss" appears naturally in H1, intro, section 2 heading, and section 2 opening. ✅ **Semantic variation weaving:** - "weight management uk" — naturally in section 3 intro - "nhs weight loss" — in section 3 context - "lose weight uk" — in section 2 clinical context - "glp-1 weight loss" — throughout section 2 - "weight loss injections uk" — section 2 - "prescription weight loss uk" — section 2 - "weight loss medication nhs" — section 3 - "bmi weight loss" — section 2 and FAQ ✅ **Tool references:** - BMI calculator referenced naturally in section 2 - GLP-1 weight loss calculator referenced in section 3 - Progress tracker referenced in FAQ Q4 ✅ **Angle compliance:** MEDICATION_UK angle delivered fully: - Section 2 covers three UK-licensed options with clinical evidence - Section 3 covers NHS vs private access routes - Encourages GP conversation throughout - Acknowledges inositol as supplement with limited evidence, redirects to prescription options ✅ **Compliance:** - No pharmacy names mentioned - Conditional language throughout ("may help", "can support", "typically") - Prescription-only status clearly stated - Individual results vary messaging present - UK English throughout (GP, NHS, MHRA, BMI, stone) - Non-judgmental tone - Educational only ✅ **HTML minification:** Section 2 and 3 content uses only `
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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.