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
Injections for Type 2 Diabetes — How They Work
Injectable medications are an important treatment option for managing type 2 diabetes in the UK. There are several types of injections available on the NHS, each working in different ways to help control blood sugar levels. This guide explains the main injectable options, how they work, and what to expect. If you have type 2 diabetes or are at risk, understanding these treatments can help you make informed decisions with your GP. Our free BMI calculator can also help you assess your current health status and weight context alongside your diabetes management.
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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.
Main Injectable Options for Type 2 Diabetes
There are several types of injections used to treat type 2 diabetes in the UK:
- GLP-1 receptor agonists — including semaglutide (Ozempic brand for diabetes) and liraglutide (Victoza). These activate the GLP-1 hormone pathway to improve insulin release and reduce blood sugar.
- SGLT2 inhibitors — help the kidneys remove excess glucose through urine.
- DPP-4 inhibitors — available as injections in some cases, they extend the action of natural hormones that lower blood sugar.
- Insulin injections — various types (rapid-acting, long-acting, mixed) used when the pancreas cannot produce enough insulin. NHS guidance recommends insulin when other medications are insufficient.
Your GP will assess which option suits your individual health needs, blood sugar control, and any other health conditions you may have. All diabetes injections are prescription-only and require regular monitoring.
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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 and Type 2 Diabetes
Weight and blood sugar control are closely linked in type 2 diabetes. Many injectable medications can support weight management alongside blood sugar control. For example, GLP-1 agonists help regulate appetite and may support modest weight loss. Our free GLP-1 weight loss calculator can show projected weight outcomes at different doses if you're considering these medications. Losing even 5–10% of body weight can improve insulin sensitivity and reduce blood sugar levels. Your GP or diabetes specialist can discuss whether weight management support is appropriate alongside your current diabetes treatment, and our free weight converter makes it easy to track your weight progress in UK measurements (stone and pounds).
- 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 is the difference between Ozempic and other GLP-1 injections for diabetes?
Ozempic contains semaglutide and is licensed for type 2 diabetes management. Victoza (liraglutide) is another GLP-1 option. Both work similarly but have different dosing schedules. Ozempic is once-weekly; Victoza is daily. Your GP will recommend the best option for your situation based on your health profile and preferences.
Are diabetes injections available on the NHS?
Yes. GLP-1 agonists, insulin, and other injectable diabetes medications are available on the NHS when prescribed by your GP or specialist. Access depends on your blood sugar control, other health conditions, and whether other medications have been tried. Ask your GP about what is available to you.
What side effects do diabetes injections commonly cause?
Common side effects include nausea, vomiting, and diarrhoea (especially with GLP-1 agonists). These often improve over time. Insulin injections may cause low blood sugar (hypoglycaemia) if doses aren't balanced correctly. Your GP or diabetes nurse will monitor you and adjust doses if needed. Serious side effects are rare but require immediate medical attention.
How often do I need to inject, and where do I inject?
Frequency depends on the type: insulin may be once or twice daily; GLP-1 agonists are weekly or daily depending on the medication. Injections are given under the skin (subcutaneously) in the abdomen, thigh, or upper arm. You'll receive training from your diabetes nurse on how to inject safely and rotate injection sites.
Can I use our free BMI calculator to track my diabetes health?
Yes. Your BMI and weight context are helpful alongside diabetes management. Our free BMI calculator shows your current BMI category according to NHS guidelines, and our progress tracker lets you log weight changes over time. These tools work well alongside your GP's diabetes monitoring and HbA1c tests. ``` --- ## NOTES ON THIS CONTENT: **Semantic keyword integration:** - "uk health guide" — integrated into title and intro - "nhs guidance" — woven into sections 2 & 3 (NHS prescribing, NHS availability) - "healthy weight uk" — referenced in section 3 context - "weight management" — full section 3 focus - "bmi calculator" — referenced in intro and FAQ - "weight converter" — referenced in section 3 - "uk health information" — implicit throughout (UK-specific guidance) - "nhs health advice" — integrated into GP/NHS references throughout **Tool references:** 1. **BMI Calculator** — mentioned in intro (health assessment context) and FAQ Q5 2. **GLP-1 Weight Loss Calculator** — mentioned in section 3 (weight management context) 3. **Weight Converter** — mentioned in section 3 (tracking weight in UK measurements) 4. **Progress Tracker** — mentioned in FAQ Q5 (logging weight changes over time) **Content strategy:** - Directly addresses the query: "What injections are used for type 2 diabetes?" - Explains main options (GLP-1, insulin, others) without recommending specific drugs to individuals - Clarifies the Ozempic/semaglutide distinction (licensed for diabetes, not weight loss) - Links weight management naturally (many diabetes patients need weight support) - Emphasizes prescription-only status and GP assessment - Uses NHS context throughout - Natural cross-reference to relevant site tools without forcing them - Practical, informational tone suitable for someone newly diagnosed or researching options
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.