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
Can Lentils Help with Weight Loss?
Lentils are a nutrient-dense food that can support weight management when included as part of a balanced diet. Rich in protein and fibre, lentils help you feel fuller for longer, which may reduce overall calorie intake. While lentils alone won't cause weight loss, they're an excellent addition to a weight management programme alongside regular physical activity. The NHS recommends including legumes like lentils in your diet for sustained energy and appetite control during weight loss efforts.
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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.
Why Lentils Support Weight Management
Lentils are high in protein and fibre — two nutrients that promote satiety and help stabilise blood sugar. A 100g portion of cooked lentils contains approximately 9g of protein and 8g of fibre, making them more filling than refined carbohydrates. This combination means you're likely to eat less overall and experience fewer cravings between meals.
- Lentils have a low glycaemic index (GI), meaning they release energy slowly and keep blood sugar stable
- They're calorie-efficient — around 116 calories per 100g cooked, yet highly satiating
- Rich in polyphenols and antioxidants, supporting overall health during weight loss
- Affordable and versatile, making them easy to include in everyday UK meals
When paired with vegetables and whole grains, lentils form the foundation of sustainable, weight loss-friendly eating. Unlike restrictive diets, adding protein-rich lentils supports long-term habit change recommended by the NHS for weight management in the UK.
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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.
Lentils vs Other Weight Loss Approaches
While whole foods like lentils are essential for sustainable weight loss, they work best as part of a comprehensive approach. For adults with a BMI of 30 or above, or 27 or above with weight-related health conditions, prescription weight loss medication alongside lifestyle changes may be considered. Our GLP-1 weight loss calculator can help you explore potential outcomes when combined with dietary improvements like adding lentils.
The NHS recommends losing weight at a rate of 0.5–1 kg per week through a combination of better nutrition, physical activity, and behavioural changes. Lentils fit perfectly into this approach, providing sustained energy for exercise and keeping hunger managed throughout the day.
- 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 many lentils should I eat daily for weight loss?
There's no specific daily amount; include a portion (approximately 150g cooked) at lunch or dinner as part of a balanced meal. This provides around 17g protein and 12g fibre. Combine with vegetables and whole grains for optimal satiety. Portion control matters — eat until satisfied, not stuffed. Gradual inclusion allows your digestive system to adapt.
Do all types of lentils help with weight loss equally?
Most lentil varieties — red, green, and brown — offer similar nutritional benefits. Red lentils cook faster and are smoother, whilst green and brown lentils have firmer texture. Choose based on preference and how you'll prepare them. All provide excellent protein and fibre for weight management in the UK.
Can lentils replace prescription weight loss medication?
No. Lentils are a healthy food that supports weight management but cannot replace prescription medication if clinically indicated. If you have a BMI of 30 or above with comorbidities, your GP can assess whether prescription treatment might help alongside dietary changes like including more lentils.
How do lentils fit into the NHS weight loss guidelines?
The NHS recommends including legumes like lentils as part of a calorie-controlled, balanced diet for weight loss. They help you achieve the recommended 0.5–1 kg weekly loss by keeping you fuller longer, reducing overall calorie intake naturally without strict restriction.
Are lentils suitable if I'm taking weight loss injections like Wegovy?
Yes. Prescription weight loss medication like Wegovy works best when combined with improved nutrition and physical activity. Lentils are an excellent choice — their high protein and fibre content aligns perfectly with the appetite-reducing effects of GLP-1 medication, supporting sustainable results.
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.