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
Weight Loss Snacks — Healthy Choices for UK Adults
Choosing the right snacks is a crucial part of sustainable weight loss in the UK. Rather than cutting out snacking entirely, smart snack choices can help you maintain energy levels, avoid overeating at main meals, and stay within your calorie goals. Whether you're managing your weight through lifestyle changes alone or alongside prescription weight loss medication, understanding which snacks support your goals matters. This guide covers evidence-based snacking strategies to help you lose weight without feeling deprived.
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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.
Best Weight Loss Snacks and Portion Control
The best weight loss snacks combine protein, fibre, and whole grains — these nutrients keep you fuller for longer and reduce cravings. Aim for snacks under 150 calories if you're in a calorie deficit, or 150–200 calories if you're combining snacking with increased physical activity.
- Protein-rich snacks: Greek yoghurt (plain), hard-boiled eggs, cottage cheese, nuts (handful), and lean supported meats
- Fibre-rich snacks: Fresh fruit (apple, pear, berries), raw vegetables (carrot sticks, hummus), and oat cakes
- Balanced snacks: Cheese and wholegrains crackers, nut butter on an apple, or a small handful of mixed nuts with berries
- Avoid: Ultra-processed snacks, sugary drinks, crisps, and chocolate — these spike blood sugar and increase hunger
The NHS recommends having structured snack times rather than grazing throughout the day. Track your snack choices using our free progress tracker to see which options help you stay on target with your weight management goals.
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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.
Snacking While Using Weight Loss Medication
If you're using GLP-1 weight loss injections like Mounjaro or Wegovy, your appetite naturally decreases, which often means you need fewer snacks. However, poor snack choices can still derail progress. Focus on nutrient-dense, easy-to-digest options: protein smoothies, sugar-free yoghurt, fruit, and vegetables are typically well-tolerated.
Avoid heavy or high-fat snacks when starting weight loss medication, as these may cause digestive discomfort. Many people find they naturally eat less while on prescription weight loss treatment, so quality matters more than quantity. Our GLP-1 weight loss calculator can help you project expected weight loss at different stages, which can motivate you to stick with positive snacking habits.
- 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's the best time to eat weight loss snacks?
Mid-morning (10–11am) and mid-afternoon (3–4pm) are ideal snack times. This prevents energy dips and reduces overeating at meals. Avoid snacking within 2 hours of bedtime, as this can disrupt sleep and trigger unwanted weight gain.
Are nuts good for weight loss?
Yes, in controlled portions. A small handful (about 30g) of unsalted nuts provides healthy fats, protein, and fibre. However, nuts are calorie-dense, so measure portions carefully. Mixed nuts with berries make an excellent balanced snack choice.
Can I snack while taking Wegovy or Mounjaro?
Yes, but many people find they need fewer snacks due to reduced appetite. Choose protein-rich, nutrient-dense options like Greek yoghurt or vegetables. Avoid heavy or greasy snacks, which may cause discomfort with GLP-1 medications.
How many calories should my snack be?
For weight loss, aim for 100–150 calorie snacks as part of a calorie deficit for UK weight management. If you're very active, 150–200 calories is acceptable. Pair snacks with water to stay hydrated, and use our free BMI calculator to track whether your overall calorie intake aligns with your healthy weight range.
What snacks should I avoid when losing weight?
Avoid sugary drinks, chocolate, crisps, biscuits, and processed bars with hidden sugars. These spike blood glucose, increase hunger, and provide little nutritional value. Instead, choose whole foods: fruit, vegetables, plain yoghurt, nuts, and eggs.
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.