Guides
Make sense of your thyroid.
Plain-English guides to your labs, conditions, treatment, appointments and food - plus the honest, practical side of living with it. Not medical advice: written to help you understand what's happening and prepare for the people treating you.
Conditions & diagnosis
Hypothyroidism: when your thyroid is underactive
An underactive thyroid makes too little hormone, and almost everything slows down with it. Here is what it feels like, why it happens, how it is treated, and what to do when the numbers look right and you still don't feel right.
Read →Hyperthyroidism: when your thyroid is overactive
An overactive thyroid floods the body with hormone, and everything speeds up - heart, gut, thoughts, temperature. Here is what it feels like, why it happens, the three treatment routes, and the warning signs that mean don't wait.
Read →Thyroid antibodies: TPO, TgAb and TRAb/TSI
Antibody tests are commonly requested when an autoimmune thyroid condition is suspected. Here is a plain-English guide to what each antibody is, which conditions it is associated with, and what a positive result does - and does not - mean.
Read →Thyroid cancer: a calm overview
A thyroid cancer diagnosis can feel overwhelming. This guide explains what it is in plain English, the most common types, and the typical path through treatment - so you know what to expect and what to ask your team.
Read →Your lab results
TSH, free T4 and free T3, in plain English
Three letters appear on almost every thyroid blood test: TSH, T4 and T3. Here is what each one is actually measuring, why they often move in opposite directions, and why a single number rarely tells the whole story.
Read →Why your lab's reference range differs
If you have ever compared your TSH result with a friend's - or looked up a "normal" range online - you may have noticed the numbers do not always match. That is not an error. Reference ranges vary, and understanding why makes your results much easier to read.
Read →One result vs the pattern
A single blood test is a snapshot taken at one moment in time. Your thyroid picture is a film - and the trend across several results over months and years is usually far more informative than any individual number.
Read →Your results came back off. What happens next?
An out-of-range number on a screen, often with no explanation attached. Here is what an abnormal thyroid result usually means, what your clinician is likely to do about it, and how long the whole thing tends to take.
Read →Thyroglobulin: the monitoring marker
After treatment for differentiated thyroid cancer, thyroglobulin becomes one of the most important numbers in your follow-up blood tests. Here is what it is, why it matters, and how to read it alongside the other values your team checks.
Read →Symptoms
Describing symptoms so you're heard
A short appointment goes fast. Knowing how to describe what you're experiencing - concretely and calmly - makes it much easier for your clinician to understand what's actually going on.
Read →Symptoms people commonly track
Thyroid conditions can affect almost every system in the body. Knowing which symptoms are worth paying attention to - and writing down - can make your appointments more useful.
Read →Tracking what actually matters
It's tempting to track everything. In practice, a few things logged consistently over time are far more useful than an exhaustive diary that's impossible to maintain - or to summarise at an appointment.
Read →Treatment
Antithyroid medication: the basics
Carbimazole, methimazole, and propylthiouracil are the medicines used to bring an overactive thyroid under control. Here's what they do, what people commonly ask about them - and one important safety warning every patient should know.
Read →Getting the most from levothyroxine
Levothyroxine is a straightforward tablet - but how and when you take it makes a real difference to how well it works. Here's what's worth knowing, and what to raise with your pharmacist or clinician.
Read →Radioactive iodine, explained
Radioactive iodine is one of the most common treatments for an overactive thyroid. Here's a plain-English guide to what it is, what to expect, and the practical questions it's worth asking your team before you go ahead.
Read →Thyroidectomy: preparing and recovering
If you're heading towards thyroid surgery, this guide covers the practical questions - what to prepare beforehand, what to expect in recovery, and the things worth raising with your surgical team.
Read →Appointments & preparing
Your appointment checklist
A well-prepared appointment is a more productive one. Here's what to gather before you go - so you can use the time to talk rather than try to remember.
Read →Preparing for a second opinion
Asking for a second opinion is a reasonable and legitimate thing to do. Going in prepared - with your history presented clearly - helps you get the most from it.
Read →What to ask when your TSH is off
An out-of-range TSH result can feel alarming - or confusing, especially when you feel fine or feel unwell but the number looks normal. These are questions to take to your clinician, not interpretations.
Read →Before radioactive iodine
Radioactive iodine (RAI) treatment involves practical preparation and a period of isolation afterwards. Here's how to prepare and what to ask your nuclear medicine team.
Read →Before thyroid surgery
If you're facing a thyroidectomy, having your questions ready and understanding what to expect beforehand can help you feel more in control going into it.
Read →After a thyroid cancer diagnosis: questions to ask
A diagnosis of thyroid cancer arrives with a lot of information and very little time to process it. This guide is not about answers - it is about helping you find the right questions, so you can get the most from every appointment.
Read →Food & nutrition
Thyroid food myths, calmly
Soy, gluten, kale, dairy, carbs, seed oils - thyroid food advice online is loud, confident and contradictory. Here's a calmer look at what the evidence actually says, and where the honest uncertainty is.
Read →Iodine: not more-is-better
Iodine is essential - but most people in the UK already get enough, and more is not better, especially with a thyroid condition. Supplements and high-dose kelp products can cause real harm.
Read →Supplements to mention before a blood test
Some supplements can interfere with thyroid blood test results or affect how other levels are interpreted. Letting your clinician or lab know what you take is a simple step that can prevent confusing results.
Read →Living with it
Fatigue and pacing
Thyroid-related fatigue is real, specific, and often poorly understood by people who haven't experienced it. This page shares practical ways that people manage energy - not as medical advice, but as ideas to explore.
Read →Anxiety, palpitations and being believed
Anxiety and a racing heart are core symptoms of hyperthyroidism - but they can also look like mental health conditions or stress responses. Being dismissed, misdiagnosed, or not believed is a common and painful experience. This page tries to name that honestly.
Read →Weight changes, without shame
Thyroid conditions can cause significant and frustrating changes to weight - in both directions. This page is about understanding what's happening, and approaching it without the layer of shame that so often gets added on top.
Read →Work, fatigue and asking for support
Thyroid conditions can affect concentration, energy, and the ability to work consistently - but many people don't know what support they're entitled to ask for. This page covers some of the practical things to be aware of in the UK context.
Read →Explaining it to the people around you
Thyroid disease can be invisible, variable, and genuinely hard to describe. This page offers some ways to talk about it - with family, friends, and colleagues - when words don't come easily.
Read →When to seek help
What is the thyroid? See it in 3D
An interactive, plain-English look at the gland in your neck - and how your brain controls it. Rotate it, tap the parts, see where everything sits.
Gentle recipes for tough days
Simple, easy meals for when energy is low - quick breakfasts, one-pan dinners and freezer-friendly batch cooks.
Trusted sources
Independent, reputable places to read more. We're not affiliated with any of them - always discuss your own situation with a qualified clinician.