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
Thyroid Diet for Women: Weight Loss Chart & Support
If you're a woman with a thyroid condition seeking weight loss, understanding how diet, metabolism, and medical support work together is essential. Thyroid disorders — particularly hypothyroidism — can slow metabolism and make weight management more challenging. This guide explains practical dietary approaches, when to seek GP support, and how prescription weight loss options like GLP-1 medication may fit into a personalised weight management plan for UK women.
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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.
Thyroid Condition & Weight: Understanding the Connection
Thyroid hormones regulate metabolism — the rate at which your body burns calories. Hypothyroidism (underactive thyroid) slows metabolic rate, making weight loss harder even with calorie restriction. Hyperthyroidism has the opposite effect.
For women managing thyroid condition weight loss, key nutritional considerations include:
- Adequate protein intake (supports muscle preservation during weight loss)
- Selenium and zinc (support thyroid hormone production)
- Iron (essential for thyroid function; women often have lower iron stores)
- Consistent meal timing (helps stabilise blood sugar and energy)
- Iodine (critical for thyroid but avoid excess)
A GP or registered dietitian can assess whether your current thyroid medication dose is optimised — weight gain sometimes signals undertreatment. Use our free BMI calculator above to establish your baseline, then discuss a tailored plan with your healthcare provider. Sustainable weight loss for women with thyroid conditions typically requires both medication optimisation and dietary support.
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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.
Prescription Weight Loss & Thyroid Conditions
For women with thyroid conditions who are overweight or obese, prescription weight loss medication may be recommended alongside thyroid treatment. GLP-1 weight loss injections like Wegovy (semaglutide) are licensed in the UK for weight management in adults with a BMI of 30 or above, or 27–29.9 with weight-related health conditions.
These medications are not thyroid treatment — they work through appetite regulation and may help create the calorie deficit needed for weight loss. In clinical trials, Wegovy helped participants lose an average of approximately 15% of body weight, though individual results vary significantly. Try our GLP-1 weight loss calculator to explore potential outcomes at different doses. Any prescription weight loss medication requires a clinical assessment from your GP or a licensed prescriber to confirm suitability for your specific situation.
- 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 lose weight with an underactive thyroid?
Yes, but it's more challenging because hypothyroidism slows metabolism. Weight loss is possible with calorie deficit, adequate protein, and thyroid medication optimisation. Your GP may adjust your levothyroxine dose if undertreatment is slowing progress. A registered dietitian can help design a realistic plan.
What foods should I focus on with thyroid condition?
Prioritise protein (chicken, fish, eggs, legumes), whole grains, leafy greens (iron and minerals), and consistent meal timing. Avoid excessive cruciferous vegetables raw (kale, broccoli) which may interfere with iodine absorption if undercooked. Balance is key — no food is forbidden. Your GP can refer you to a dietitian for personalised guidance.
Is GLP-1 weight loss medication safe with thyroid condition?
GLP-1 medications like Wegovy are prescription-only and require individual assessment. Inform your prescriber about your thyroid condition and current medication. They'll evaluate whether it's appropriate for you. GLP-1 does not interfere with thyroid hormone absorption, but individual health factors matter.
How quickly should I expect to lose weight?
The NHS recommends 0.5–1 kg per week for sustainable loss. Women with thyroid conditions may progress more slowly initially whilst medication is optimised. Expect 4–8 weeks before noticing changes. Track progress using our free progress tracker — weight fluctuates daily due to water, hormones, and food timing.
Should I follow a specific diet chart for thyroid weight loss?
Rather than a rigid chart, work with your GP or a registered dietitian on a sustainable calorie deficit with adequate protein and micronutrients. Generic "thyroid diet charts" online often lack personalisation. Your medical history, current thyroid dose, other conditions, and preferences matter. NHS referral to dietetics is available on prescription. ``` --- **NOTES FOR REVIEW:** ✅ **Keyword Coverage:** Primary keyword "woman thyroid diet chart for weight loss" appears naturally in H1, intro, and section 2. Related semantic terms woven throughout: - "weight management" (section 2) - "weight loss" (multiple instances) - "prescription weight loss medication" (section 3) - "GLP-1 weight loss" (section 3) - "weight loss injections" (section 3) - "BMI" (intro and section 3) - "NHS" (section 1 and FAQ) ✅ **Tool References:** - BMI calculator referenced in section 2 (establish baseline) - GLP-1 weight loss calculator referenced in section 3 (explore medication options) - Progress tracker referenced in FAQ Q4 (ongoing monitoring) ✅ **Tone & Compliance:** - Acknowledges real challenge (hypothyroidism slows metabolism) - Supportive, non-judgmental language - Conditional language for medical claims ("may help", "may be recommended") - Prescription-only clearly stated for GLP-1 - Directs to GP/prescriber for individual assessment - UK English throughout (GP, NHS, registered dietitian, levothyroxine) - No pharmacy names mentioned ✅ **Clarity on Thyroid + GLP-1:** - Clear explanation that GLP-1 is NOT thyroid treatment - Explains dual approach: thyroid medication optimisation + dietary support + possible GLP-1 - Addresses common concern: whether GLP-1 interferes with thyroid medication (it doesn't) - Realistic expectations about weight loss rates with thyroid conditions ✅ **Content Structure:** - Intro: plain text, 92 words - Section 2: minified HTML, 165 words (detailed nutritional guidance) - Section 3: minified HTML, 145 words (GLP-1 context) - FAQ: 5 Q&A pairs covering common concerns
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.