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Why take this test?
Most investigations into a thyroid disorder begin by testing levels of thyroid stimulating hormone (TSH) and free thyroxine (FT4). TSH is produced by the pituitary gland to stimulate the thyroid to produce more thyroid hormones. Thyroxine (T4) is the main thyroid hormone produced by the thyroid gland - this test measures the amount of free T4 (T4 which is not bound to protein) in the blood.
If your thyroid gland is struggling to produce thyroid hormones, you will typically see your level of TSH rise in an effort to stimulate thyroid production. An elevated TSH and low FT4 result suggests an underactive thyroid (hypothyroidism). Learn more about hypothyroidism.
If you have too much circulating thyroid hormone, your level of TSH will reduce as it has no job to do. Low TSH and raised FT4 indicates an overactive thyroid (hyperthyroidism). Learn more about hyperthyroidism.
It is very important to diagnose and correct a thyroid problem as both an overactive and an underactive thyroid not only cause debilitating symptoms, but also can pose serious health risks in the future.
We send you an easy-to-use kit to collect your blood sample.
Post your sample to our lab in the prepaid envelope provided.
View results securely in your own personal dashboard.
Our tests are not a substitute for seeing your doctor, especially if you are suffering symptoms. Our doctors will interpret your results based on the information you have provided, but will not diagnose, consult or provide any treatment. You will be advised to see your doctor for any necessary follow-up action.
Thyroid Stimulating Hormone (TSH) is produced in the pituitary gland and stimulates the thyroid gland to produce thyroid hormones thyroxine (T4) and triiodothyronine (T3).
High levels of TSH indicate an underactive thyroid while low levels indicate an overactive thyroid. In primary pituitary failure, a low TSH will be associated with an underactive thyroid.
Thyroxine (T4) is one of two hormones produced by the thyroid gland. Most T4 is bound to carrier proteins in the blood. This test measures the level of T4 which is free, or unbound, circulating in your blood.
High levels of free thyroxine can indicate an overactive thyroid while low levels can indicate an underactive thyroid.
We will send you your Thyroid Check finger-prick blood sample collection kit which contains everything you need to take your blood sample in the comfort of your own home. If you are unsure about completing a finger-prick blood sample collection you will have the opportunity to select a clinic-based venous blood sample option during the checkout process.How to collect a finger-prick blood sample
Your Thyroid Check includes 1st class postage and packaging for you to send your blood sample directly to our laboratory for analysis. If you live in an area where you cannot rely on the post or you simply want to ensure that your sample arrives at the laboratory the following day, you may wish to send your blood sample guaranteed next day delivery for extra reassurance.
Your blood sample will be analysed at one of our chosen laboratories. You can be assured of fast, accurate results from one of our accredited independent providers of clinical diagnostic tests.
Our medical team will comment on out-of-range blood results and give you follow-up advice where necessary. If you need it, a PDF copy of your Thyroid Check results can be downloaded for your doctor.
Once you have placed your order you can visit my.medichecks.com where you can manage your account, track your orders and view your Thyroid Check results.
Stay motivated by filling in your online health and lifestyle questionnaire and seeing how improvements in your lifestyle can influence your results. Your medical and family history gives us vital information when interpreting your results.