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
Vegan Nutrition Plan For Weight Loss
A well-planned vegan nutrition strategy can support sustainable weight loss when combined with a calorie deficit and regular physical activity. Plant-based eating offers flexibility for weight management in the UK, with access to diverse vegetables, legumes, whole grains, and plant proteins. Whether you're exploring dietary changes alone or alongside prescription weight loss medication, understanding vegan nutrition principles helps you build a sustainable approach. This guide covers the key nutrients to prioritise, practical meal planning, and how a vegan diet fits within NHS weight loss recommendations. Use our free BMI calculator above to check where you currently stand, and our weight loss calculator to explore your options.
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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.
Key Nutrients And Protein In A Vegan Weight Loss Plan
A vegan weight loss plan must balance calories, protein, and essential micronutrients to avoid nutrient deficiencies while supporting weight management. Plant-based protein sources include lentils, chickpeas, tofu, tempeh, nuts, seeds, and whole grains — aim for 1.2–1.6g protein per kg of body weight daily, especially during weight loss to preserve muscle.
- Vitamin B12: Take a supplement or consume fortified plant-based milk and cereals — vegans cannot reliably get B12 from plant sources alone
- Iron: Eat leafy greens, fortified cereals, and lentils with vitamin C (citrus, peppers) to enhance absorption
- Calcium: Fortified plant-based milk, tofu, tahini, and leafy greens provide calcium without dairy
- Omega-3 fatty acids: Include flaxseeds, chia seeds, walnuts, or algae supplements
- Iodine: Use iodised salt or a small supplement — seaweed sources are unreliable
For sustainable weight loss within NHS guidelines, create a calorie deficit of approximately 500 kcal per day to lose around 0.5–1 kg per week. A vegan diet can achieve this effectively when portion-controlled and focused on whole foods rather than processed vegan alternatives.
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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.
Building A Balanced Vegan Meal Plan For Weight Loss
Start each day with protein-rich breakfast options like tofu scramble, oat porridge with plant milk and seeds, or chia pudding. Lunch and dinner should include a lean plant protein (legumes, tofu, tempeh), plenty of non-starchy vegetables, and a modest portion of whole grains or starchy vegetables. Snacks matter — choose nuts, seeds, fruit, hummus with vegetables, or plant-based yoghurt to manage hunger between meals.
Meal prep weekly to reduce reliance on processed vegan convenience foods, which often contain excess salt, sugar, and calories. Track your weight progress using our free progress tracker to monitor whether your vegan plan is delivering sustainable results. If you're not seeing the expected weight loss after 8–12 weeks despite adhering to a calorie deficit, discuss options with your GP — including whether prescription weight loss medication such as GLP-1 injections might support your weight management alongside your plant-based approach.
- 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.
Can a vegan diet help me lose weight?
Yes. A well-planned vegan diet can support weight loss because plant-based whole foods tend to be lower in calories and higher in fibre than many animal products, promoting satiety. Weight loss depends on creating a calorie deficit — approximately 500 kcal per day for 0.5–1 kg per week loss according to NHS guidelines. The key is focusing on whole foods (legumes, grains, vegetables, nuts) rather than processed vegan alternatives.
How much protein do I need on a vegan weight loss plan?
During weight loss, aim for 1.2–1.6 grams of protein per kilogram of body weight daily to help preserve muscle mass. Use our BMI calculator and weight converter to establish your current weight in kg, then multiply by 1.2–1.6. Good vegan protein sources include lentils, chickpeas, tofu, tempeh, nuts, seeds, and whole grains combined strategically.
What supplements do vegans need for weight loss?
Vitamin B12 is essential — take a supplement or use fortified plant-based milk and cereals, as vegans cannot reliably source B12 from plants alone. Consider iodine, omega-3 (algae supplement), and potentially vitamin D, especially in UK winters. A GP or registered dietitian can advise which supplements suit your individual needs.
Does a vegan diet work with weight loss injections like Mounjaro or Wegovy?
Yes. A vegan nutrition plan can complement prescription GLP-1 weight loss medications. Both work via different mechanisms — the medication helps regulate appetite whilst your vegan diet provides the nutritional framework. Always inform your prescriber about your vegan approach so they can monitor for any nutrient interactions.
How do I track weight loss on a vegan plan?
Use our free progress tracker to log your weight weekly. Monitor not just weight but how you feel, energy levels, and whether your clothes fit better. If weight loss plateaus after 8–12 weeks despite a calorie deficit, consult your GP — they can advise whether additional support, including prescription weight loss medication available through NHS weight management services or privately, might help.
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.