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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Can Peanut Butter Help With Weight Loss?
Peanut butter is calorie-dense but can fit into a weight loss plan when eaten in controlled portions. While it's high in fat and calories, peanut butter provides protein and fibre that may help you feel fuller for longer. The key to using peanut butter for weight management in the UK is understanding portion sizes and how it fits into your overall calorie intake. This guide explains the nutrition facts and practical tips for including peanut butter as part of a balanced, sustainable approach to losing weight.
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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
A 2-tablespoon (32g) serving of peanut butter contains approximately 188 calories, 7g protein, 7g carbohydrates, and 16g fat. This calorie density is why portion control matters for weight loss. However, peanut butter's protein and fibre content can support satiety — meaning you may feel fuller after eating it, potentially reducing overall food intake throughout the day.
- Protein content helps preserve muscle during weight loss and reduces hunger hormones
- Healthy fats (monounsaturated and polyunsaturated) support nutrient absorption and hormonal balance
- Fibre aids digestive health and supports stable blood sugar levels
- Calorie density means portion control is essential — a small serving goes a long way
Research suggests that foods higher in protein and fibre are associated with better weight management outcomes. When used mindfully, peanut butter can be part of an effective weight loss strategy within the context of a reduced-calorie diet.
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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.
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Practical Tips for Including Peanut Butter in Weight Loss
For sustainable weight management in the UK, try these practical approaches: measure portions using a tablespoon or kitchen scale rather than eating straight from the jar, pair peanut butter with whole grains or vegetables to increase fibre and volume, and account for peanut butter calories in your daily total. Use our free BMI calculator to understand your current weight status and healthy weight range, then calculate the calorie deficit you need to achieve your goals.
- Spread 1–2 tablespoons on wholemeal toast with banana for a balanced snack
- Mix into Greek yoghurt or oatmeal to add protein and extend satiety
- Use as a dip for raw vegetables (celery, apple slices) to add nutrients without extra calories
- Choose natural peanut butter where possible — lower in added sugars and hydrogenated oils
- 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.
Is peanut butter good for weight loss?
Peanut butter can support weight loss when eaten in controlled portions (1–2 tablespoons per day) as part of a calorie-controlled diet. Its protein and fibre content helps with satiety, but its calorie density means overeating is easy. Individual results depend on overall calorie intake, physical activity, and personal metabolism.
How many calories are in a serving of peanut butter?
A standard 2-tablespoon (32g) serving contains approximately 188 calories. Portion size is critical for weight loss — using a tablespoon to measure prevents accidental overeating. Always account for peanut butter calories within your daily calorie target.
Can I eat peanut butter every day while losing weight?
Yes, if portions are controlled. Daily peanut butter consumption is fine for weight loss as long as it fits within your calorie deficit. Many people find a small daily serving sustainable and satisfying. Monitor your overall weight loss progress using our free progress tracker.
What's the difference between peanut butter and other nut butters for weight loss?
Almond butter and other nut butters have similar calorie and nutritional profiles to peanut butter (around 180–200 calories per 2 tablespoons). Peanut butter is slightly more affordable and offers comparable protein. Choose based on preference and what you'll stick with consistently.
Should I avoid peanut butter if I'm taking weight loss medication?
Peanut butter doesn't interact negatively with prescription weight loss medications like Mounjaro or Wegovy. However, people taking GLP-1 injections may experience reduced appetite, making portion control easier. Always discuss your diet with your GP or prescriber if you're on medication for weight management.
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.