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Underactive Thyroid Levothyroxine Monitoring Blood Test

Underactive Thyroid Levothyroxine Monitoring Blood Test

2 Biomarkers (View)

Experience the convenience of monitoring your thyroid health from home with this simple thyroid blood test. If you’re managing an underactive thyroid, consider our Underactive Thyroid Levothyroxine Monitoring Blood Test for a more detailed look at your thyroid function.

Take control of your health with our best-selling checks. Whether you’re tackling symptoms, addressing health concerns, or simply being proactive, this test helps you gain insights and reduce your risk of common conditions.

Discover the power of small lifestyle changes to feel like yourself again.

  • Results in 3-5 days
  • Bespoke medical report
  • Convenient options
  • Free delivery

£42.00

Biomarker Table

Thyroid hormones

TSH

Thyroid stimulating hormone (TSH) is produced in the pituitary gland in order to regulate the production of thyroid hormones thyroxine (T4) and triiodothyronine (T3) by the thyroid gland. If thyroid hormones in the blood are low, then more TSH is produced to stimulate the thyroid gland to produce more of them. If thyroid hormone levels are high, then the pituitary produces less TSH to slow the production of thyroid hormones. If TSH is too high or too low, it normally signifies that there is a problem with the thyroid gland which is causing it to under or over produce thyroid hormones. Sometimes a disorder of the pituitary gland can also cause abnormal TSH levels.

Free thyroxine

Thyroxine (T4) is one of two hormones produced by the thyroid gland. It works to speed up the rate of your metabolism. Most T4 is bound to carrier proteins in the blood – it is only the free, or unbound, T4 that is active in the body, which is measured in this test. Free T4 is the less active of the two main thyroid hormones. To have an impact on your cells it needs to convert to the more active T3 when your body needs it.