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 Weight Loss Reduce Cholesterol?
Yes, weight loss can meaningfully reduce cholesterol levels, particularly LDL ("bad") cholesterol. Even modest weight loss of 5–10% of your body weight may improve your cholesterol profile. The NHS confirms that maintaining a healthy weight is one of the most effective ways to manage cholesterol alongside diet and physical activity. Understanding the link between weight and cholesterol can help you make informed decisions about your health. Use our free BMI calculator to check where your weight currently sits, and our weight loss calculator to explore potential health improvements through weight management.
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 Weight Loss Impacts Cholesterol Levels
Excess weight, particularly excess fat stored around the abdomen, is strongly linked to unhealthy cholesterol profiles. When you carry extra weight, your body produces more LDL cholesterol (the type that narrows arteries) and less HDL cholesterol (the protective type). Losing weight reverses this process.
Research shows:
- Every 1 kg of weight lost can reduce LDL cholesterol by approximately 0.7 mmol/L
- A 5–10% reduction in body weight typically improves the entire cholesterol profile
- Weight loss of 10 kg or more may significantly lower triglycerides (another harmful blood fat)
The mechanism is straightforward: excess body fat increases inflammation and affects how your liver processes cholesterol. Weight management and NHS weight loss guidance both emphasise that sustainable weight loss through calorie deficit and increased physical activity produces consistent improvements in cholesterol within 2–3 months.
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 Loss and Cardiovascular Health
Cholesterol is just one cardiovascular risk factor. Weight loss also reduces blood pressure, improves blood sugar control, and decreases inflammation throughout your body—all key factors in heart health. The NHS recommends weight management for anyone with high cholesterol, particularly those with a BMI above 25 or those carrying excess abdominal fat.
If you have high cholesterol and are overweight, losing weight should be your first step before or alongside medication. Your GP can measure your cholesterol levels and advise on targets for your age and health status. Combining weight loss with a heart-healthy diet (Mediterranean diet pattern is particularly supported by evidence) and regular activity produces the best outcomes for cholesterol management.
- 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.
How much weight do I need to lose to reduce cholesterol?
Even 5–10% of your body weight can improve cholesterol significantly. If you weigh 80kg, losing just 4–8kg may show meaningful improvements. Use our free BMI calculator to identify your current weight category and set realistic targets with your GP.
How quickly does cholesterol improve with weight loss?
Most people see improvements in cholesterol levels within 2–3 months of sustained weight loss. However, individual timescales vary. Your GP can measure your cholesterol and track progress over time.
Can weight loss medication like Wegovy help reduce cholesterol?
Yes. Wegovy (semaglutide) is a prescription-only GLP-1 injection licensed for weight management in the UK. Clinical trials showed it supports significant weight loss, which typically improves cholesterol as part of the weight management process. A prescriber will assess whether it's appropriate for you.
Is diet or exercise more important for cholesterol—weight loss or diet type?
Both matter. Weight loss itself reduces cholesterol, but the type of diet also impacts cholesterol independently. A Mediterranean-style diet combined with weight loss produces the best results. Your GP or a dietitian can advise on a plan tailored to your situation.
If I lose weight, can I avoid cholesterol medication?
Possibly—for some people, weight loss is sufficient. For others, medication may still be needed depending on genetic factors and your cholesterol levels. This is a discussion to have with your GP, who can review your results and risk factors.
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.