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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Best Time to Eat Dark Chocolate for Weight Loss
Dark chocolate can be part of a healthy weight management UK plan, but timing and portion size matter more than when you eat it. Dark chocolate is rich in antioxidants and may support satiety, but it's calorie-dense — typically 150–170 kcal per 30g serving. The best approach combines sensible portions with a calorie-aware diet and, for eligible adults, prescription weight loss medication or lifestyle changes. This guide explains how to incorporate dark chocolate into weight loss without derailing your goals.
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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.
Timing, Portions, and Weight Loss Strategy
The "best time" to eat dark chocolate isn't about the clock—it's about portion control and hunger management. Here's what the evidence suggests:
- After meals: Eating dark chocolate after a balanced meal (rather than on an empty stomach) may reduce the spike in blood sugar and help you feel fuller longer, supporting weight management
- As a planned snack: A small square (10–15g) of dark chocolate eaten mindfully with a cup of tea or coffee can satisfy cravings without excessive calories
- Avoid using it for emotional eating: Eating dark chocolate to manage stress or boredom often leads to overconsumption—reserve it for planned portions only
- Portion size is key: Limit to one 30g serving (about 6–8 squares) per day maximum. At roughly 150 kcal, this fits comfortably into a calorie-controlled diet for weight loss
For sustainable weight loss UK outcomes, dark chocolate works best as part of a structured eating plan—not as a primary weight loss tool. If you're looking at prescription weight loss medication or need professional guidance, your GP or a registered prescriber can assess your individual needs.
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If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.
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Dark Chocolate Composition and Satiety
Dark chocolate (70% cocoa or higher) contains polyphenols and magnesium, which may support satiety—the feeling of fullness. However, satiety from dark chocolate is modest compared to protein-rich foods or fibre. A square or two can help reduce cravings, but it shouldn't replace protein, vegetables, or whole grains in your weight loss plan.
For weight loss success, combine sensible dark chocolate portions with regular physical activity, a calorie deficit (typically 500 kcal/day for ~0.5kg/week loss), and, if eligible, evidence-based interventions like GLP-1 weight loss medication. Try our free GLP-1 weight loss calculator to explore projected outcomes, and use our BMI calculator to track whether your current approach is working for your weight management goals.
- 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.
Does dark chocolate actually help with weight loss?
Dark chocolate itself doesn't cause weight loss—calorie deficit does. However, dark chocolate's polyphenols and fibre may support satiety, which can help you feel fuller and reduce overall calorie intake. The key is portion control: one 30g serving (150 kcal) per day fits into a weight loss plan, but larger amounts undermine calorie targets.
Is it better to eat dark chocolate before or after meals?
After meals is preferable. Eating dark chocolate after a balanced meal (with protein and fibre) slows blood sugar spikes and enhances satiety. On an empty stomach, dark chocolate may cause a rapid energy spike followed by hunger. Mindful eating—slowly enjoying a small portion—also supports better portion control.
How much dark chocolate can I eat per day while losing weight?
Limit dark chocolate to one 30g serving (about 6–8 squares) per day, providing roughly 150 kcal. This fits comfortably into a weight loss plan. For effective weight loss UK results, combine small dark chocolate portions with a calorie-controlled diet, increased physical activity, and potentially prescription weight loss medication if eligible through your GP.
Will dark chocolate interfere with Mounjaro or Wegovy weight loss?
Dark chocolate in small, planned portions (30g/day) won't interfere with Mounjaro or Wegovy. These prescription medications work through GLP-1 or GIP/GLP-1 mechanisms to reduce appetite—they remain effective regardless of modest chocolate portions. However, avoid using chocolate to circumvent the appetite-suppressing benefits of these medications.
What's the best dark chocolate percentage for weight loss?
Choose dark chocolate 70% cocoa or higher. Higher cocoa percentages contain more polyphenols and fibre, which support satiety, and are less palatable in large quantities—naturally limiting overconsumption. Avoid milk chocolate or lower-cocoa varieties, which are higher in sugar and less satiating per calorie.
Ready to take control of your weight loss journey?
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