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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Is Peanut Butter Good for Weight Loss?
Peanut butter is calorie-dense and high in protein, making it neither inherently good nor bad for weight loss — it depends entirely on portion control and how it fits into your overall diet. A 2-tablespoon serving contains around 190 calories and 7g of protein, which can support satiety when eaten mindfully. For sustainable weight management in the UK, the key is balancing nutrient-dense foods like peanut butter within a reduced-calorie diet alongside increased physical activity. Many people find that including protein-rich foods helps them feel fuller for longer, supporting their weight loss goals.
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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.
Peanut Butter Nutrition and Weight Loss
Peanut butter is approximately 50% fat by weight, but most of this is unsaturated fat — the healthier variety. A standard 2-tablespoon (32g) serving contains around 190 calories, 7g protein, 8g carbohydrates, and 16g fat. The high protein and fat content means peanut butter triggers satiety signals, helping you feel satisfied after eating smaller portions.
For weight loss, peanut butter isn't forbidden — it's about portion awareness. A common mistake is eating directly from the jar, which easily leads to consuming 4–5 tablespoons without noticing. Pre-measured portions (one 2-tablespoon serving) work better. Many people successfully incorporate peanut butter into a calorie-controlled diet by pairing it with lower-calorie foods like apple slices, celery, or wholemeal toast. The NHS recommends a balanced diet including protein-rich foods, and peanut butter fits this framework when portions are controlled.
- Protein content supports muscle retention during weight loss
- Fat and protein together promote feelings of fullness
- Natural varieties without added sugar are preferable
- Pre-portioning prevents accidental overeating
Clinically BackedWeight 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.
Peanut Butter Within a Weight Loss Strategy
Successful weight management in the UK centres on creating a sustainable calorie deficit — typically 500 kcal per day for approximately 0.5kg weekly loss, according to NHS guidance. Within this framework, peanut butter can be part of a healthy diet if it's accounted for in your daily calorie intake. Consider using our free BMI calculator to establish your current health baseline, then track your intake and progress with our weight loss calculator to see how different approaches work for your body.
For those considering prescription weight loss medication as part of their weight management strategy, options like GLP-1 weight loss injections are available through NHS specialist services or private prescribing. These medications may help reduce appetite and support adherence to dietary changes — but they work alongside, not instead of, balanced nutrition and physical activity. Always speak with your GP about the right approach for your individual circumstances.
- 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 peanut butter can I eat on a weight loss diet?
The NHS recommends measuring peanut butter carefully — typically 1–2 tablespoons (32–64g) per serving. A 2-tablespoon portion contains around 190 calories. Pre-measuring prevents accidental overeating directly from the jar. Include it within your daily calorie target, paired with lower-calorie foods like apple slices or wholemeal toast for a balanced snack.
Is natural peanut butter better than regular peanut butter for weight loss?
Natural peanut butter (just peanuts and salt) is typically identical in calories to regular varieties — around 190 calories per 2-tablespoon serving. The main difference is added sugar and oils in some commercial brands. For weight loss, natural varieties are preferable because they avoid extra sugars, but calorie content is the primary factor in weight management.
Can peanut butter help me lose weight?
Peanut butter itself doesn't cause weight loss, but its protein and fat content promotes satiety, meaning you may eat less overall. This can support weight loss if portions are controlled and it's included within a calorie deficit. Weight loss requires a reduced-calorie diet, physical activity, and consistency — peanut butter is simply one food that can fit within this strategy.
Should I avoid peanut butter if I'm trying to lose weight?
No — you don't need to avoid peanut butter. Complete restriction often leads to cravings and unsustainable dieting. Instead, include measured portions (1–2 tablespoons) within your daily calorie allowance. The key to sustainable weight loss is balance, not elimination. Pair peanut butter with vegetables or fruit to increase overall satiety with fewer calories.
What's the best way to include peanut butter in a weight loss plan?
Pre-measure portions into small containers or use marked serving spoons to prevent overeating. Pair 1–2 tablespoons with lower-calorie foods: apple slices, celery, wholemeal crackers, or oat cakes. Log it in a food diary or calorie-tracking app to stay within your daily target. Use our free progress tracker to monitor your weight loss journey over time and adjust as needed.
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.