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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14 Day Meal Plan For Hypothyroidism And Weight Loss — UK Options
Managing weight with hypothyroidism requires both dietary support and, for eligible adults, prescription medication options available in the UK. A 14 day meal plan tailored to thyroid health can support your goals, but many people benefit from additional treatment. This guide explores meal planning for hypothyroidism, UK-licensed weight loss injections, and how to discuss medication options with your GP if you're struggling to lose weight uk despite lifestyle changes. Individual support from your healthcare team is essential.
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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.
UK-Licensed Weight Management Options For Hypothyroidism
If you have hypothyroidism and a BMI over 30, or BMI 27–29.9 with weight-related health conditions, you may be eligible for prescription weight loss medication in the UK. Three main options are licensed: Mounjaro (tirzepatide), a dual GIP and GLP-1 injection taken once weekly; Wegovy (semaglutide), a GLP-1 injection also taken once weekly; and Saxenda (liraglutide), a daily injection. Clinical trials show these medications support weight loss on average alongside reduced-calorie diet and increased activity — results vary between individuals.
- Mounjaro: Up to 15 mg weekly; average 15–clinically studied weight loss in trials
- Wegovy: Up to 2.4 mg weekly; average clinically studied weight loss in trials
- Saxenda: Up to 3 mg daily; supports weight management when combined with lifestyle changes
All are prescription-only medicines requiring clinical assessment to check suitability. Your GP can assess whether medication is appropriate for your individual health and thyroid management.
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.
NHS Access And How To Start The Conversation With Your GP
In the UK, access to weight loss medication nhs services happens through two routes. NHS specialist tier 3 services offer assessment and prescription if you meet criteria, though waiting lists vary significantly by region. Private prescribing through registered UK prescribers is also available without NHS referral. Start by speaking with your GP about your weight, thyroid management, and frustrations with weight loss despite effort.
- Your GP can refer you to specialist weight management services if eligible
- Request assessment of whether prescription medication suits your situation
- Discuss how weight loss treatment works alongside thyroid medication (levothyroxine)
- Calculate your BMI using our free BMI calculator to have concrete figures for your conversation
Whether pursuing NHS or private routes, a prescriber will assess your individual health before offering treatment. Medication works best combined with a supportive meal plan and increased physical activity.
- 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.
Can I take weight loss injections if I have hypothyroidism?
Yes, if you meet NHS criteria (BMI ≥30, or BMI 27–29.9 with weight-related conditions). However, a prescriber must assess your individual health, including how well your thyroid is controlled. Weight loss medication works alongside levothyroxine and does not interact significantly with thyroid treatment. Your GP should be involved in any decision.
What should a 14 day meal plan for hypothyroidism include?
Focus on thyroid-supporting foods: selenium-rich foods (Brazil nuts, fish), iodine sources (seaweed, dairy), and anti-inflammatory options (leafy greens, berries). Avoid excess goitrogenic foods (raw cruciferous vegetables in large amounts). Include lean protein, whole grains, and healthy fats. A dietitian can create a personalised plan. If weight loss is difficult, discuss medication options with your GP.
How quickly will I lose weight with prescription weight loss medication?
In clinical trials, average weight loss is 0.5–1 kg per week on prescription medications like Mounjaro and Wegovy. However, individual results vary significantly — some people lose more, some less. Weight loss is not assured. Results improve when medication is combined with reduced-calorie diet and increased physical activity. Use our free GLP-1 weight loss calculator to estimate potential results at different doses.
What's the difference between NHS and private weight loss medication in the UK?
NHS access is through specialist tier 3 services (often with waiting lists) if referred by your GP. Private prescribing offers faster access through registered UK prescribers without NHS referral but involves out-of-pocket costs. Both routes require clinical assessment. Speak with your GP first — they can advise which route suits your situation best.
Will weight loss medication work without lifestyle changes?
Medication is most effective alongside a reduced-calorie diet and increased physical activity. A 14 day meal plan tailored to hypothyroidism, combined with movement, gives the best results. Medication supports this effort by reducing appetite and helping you feel fuller — it is not a replacement for healthy lifestyle changes. Your prescriber will discuss expectations during assessment.
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.