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
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What Vegetables Are Good For Weight Loss?
Vegetables are among the best foods for weight loss because they're low in calories, high in fibre, and packed with nutrients that keep you feeling full. If you're working towards weight loss in the UK — whether through dietary changes alone or alongside prescription weight loss medication — vegetables should form the foundation of your eating plan. The right vegetables can support sustainable weight management by helping you maintain a calorie deficit without feeling deprived. This guide covers the most effective vegetables for weight loss and how to use them strategically in your diet.
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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.
The Best Vegetables For Weight Loss
The most effective vegetables for weight loss are those with the highest fibre content and lowest calorie density. Leafy greens like spinach, kale, and lettuce are exceptionally low in calories (around 20–30 kcal per 100g) and can be eaten in large quantities without impacting your calorie intake. Cruciferous vegetables including broccoli, cauliflower, and Brussels sprouts contain compounds that may support metabolism and are very satiating due to their fibre content.
Other excellent choices include:
- Courgettes and marrows — roughly 18 kcal per 100g, great for bulking out meals
- Peppers — around 30 kcal per 100g, rich in vitamin C and antioxidants
- Mushrooms — approximately 22 kcal per 100g, provide umami flavour and satiety
- Tomatoes — about 18 kcal per 100g, versatile and nutrient-dense
- Green beans and asparagus — roughly 30 kcal per 100g, high in fibre relative to calories
- Celery and cucumber — around 16 kcal per 100g, very hydrating and filling
These vegetables are ideal because they allow you to eat larger meal portions whilst staying within a calorie deficit — a key principle of sustainable weight loss.
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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.
How Vegetables Support Weight Loss
Vegetables support weight loss through several mechanisms. High fibre content slows digestion, increases feelings of fullness, and helps regulate blood sugar levels — reducing cravings and energy crashes. Water content in vegetables like lettuce and cucumber adds volume to meals with minimal calories, helping you feel satisfied on fewer calories overall.
Additionally, vegetables are nutrient-dense, providing vitamins and minerals your body needs during weight loss, which helps prevent the nutritional deficiencies that can occur with restrictive dieting. If you're following NHS weight loss guidance or using prescription weight loss medication like GLP-1 injections, vegetables are essential because they provide nutritional support whilst fitting easily within a reduced-calorie eating plan. Use our free BMI calculator to track where you stand, and our GLP-1 weight loss calculator can help project results when combined with vegetable-based meal planning.
- 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 portions of vegetables should I eat daily for weight loss?
The NHS recommends five portions of fruit and vegetables daily. For weight loss, aim for at least three portions of vegetables (roughly 300g total) at main meals. Focus on lower-calorie vegetables like leafy greens and cruciferous varieties to maximise volume without exceeding your calorie target. Most vegetables are so low in calories that you can eat generous portions freely.
Are potatoes and parsnips good for weight loss?
Potatoes and parsnips are higher in calories (around 77 and 75 kcal per 100g respectively) compared to leafy greens, but they're not "bad" for weight loss. They contain valuable fibre and nutrients. Include them in moderation within your calorie budget, particularly boiled or baked versions without added fat. Sweet potatoes offer similar nutritional benefits.
Can vegetables alone help me lose weight without changing anything else?
Vegetables alone won't create the calorie deficit needed for weight loss. You must consume fewer calories than you burn overall. Vegetables are excellent *within* a calorie-controlled diet because they help you feel full whilst eating fewer calories. Combine vegetable-based meals with portion control and increased activity for sustainable results.
Are frozen or tinned vegetables as good as fresh for weight loss?
Yes, frozen vegetables are nutritionally equivalent to fresh and often more affordable. Tinned vegetables are also fine — just rinse to remove excess salt. Frozen and tinned options are convenient and equally supportive of weight loss when incorporated into a calorie deficit. Avoid vegetables in heavy sauces or oils.
Do vegetables help if I'm taking weight loss medication like Wegovy or Mounjaro?
Absolutely. Vegetables are ideal alongside prescription weight loss medication because they provide nutritional support whilst fitting easily within the reduced appetite many people experience. They're especially valuable because GLP-1 medications like Wegovy require a reduced-calorie diet and increased physical activity to work effectively — vegetables make this easier by allowing larger meal volumes with fewer calories.
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.