Extended thyroid test


People with an underactive thyroid (hypothyroidism) may feel tired, depressed and gain weight; whilst symptoms of an overactive thyroid (hyperthyroidism) include difficulty sleeping, palpitations, feeling weak, an enlarged thyroid gland or weight loss.

SKU: RD005 Category:


Our thyroid function tests assess the health of your thyroid by measuring the level of hormones in your blood that are released by the thyroid gland – thyroxine (T4) and Tri-iodothyronine (T3) – as well as the level of thyroid stimulating hormone (TSH) released by the pituitary gland. In this extended thyroid test, two thyroid autoantibodies (TPO and TG) will also be checked for any abnormalities.

People with an underactive thyroid (hypothyroidism) may feel tired, depressed and gain weight; whilst symptoms of an overactive thyroid (hyperthyroidism) include difficulty sleeping, palpitations, feeling weak, an enlarged thyroid gland or weight loss.

  • Anti-Thyroglobulin (Anti-TG)
    Anti-Thyroglobulin (Anti-TG) antibodies are proteins that the immune system produces against thyroglobulin, a key protein in the thyroid gland involved in the production of thyroid hormones. These are often found in autoimmune thyroid diseases, such as Hashimoto's thyroiditis and Graves' disease. Their presence indicates an immune response against the thyroid gland, which can lead to thyroid dysfunction.

  • Anti-Thyroid Peroxidase (Anti-TPO)
    Anti-Thyroid Peroxidase (Anti-TPO) antibodies are markers tested in the blood to detect autoimmune thyroid diseases. Thyroid peroxidase is an enzyme in the thyroid gland essential for the production of thyroid hormones. High Levels of Anti-TPO indicate the presence of antibodies that are attacking the thyroid. This is commonly seen in autoimmune thyroid disorders like Hashimoto's thyroiditis (leading to hypothyroidism) and Graves' disease (associated with hyperthyroidism).

  • Free T3
    Free T3, or free triiodothyronine, is a blood test that measures the unbound or "free" portion of the hormone T3 (triiodothyronine) circulating in the blood. T3 is one of the two major hormones produced by the thyroid gland and is more potent than T4, though present in smaller amounts. Free T3 is an important test to assess thyroid function and is especially useful in diagnosing and managing hyperthyroidism, as T3 levels are often the last to decline in hypothyroidism.

  • Thyroid Stimulating Hormone (TSH)
    Thyroid Stimulating Hormone (TSH) is a hormone produced by the pituitary gland that regulates the function of the thyroid gland. It stimulates the thyroid to produce thyroid hormones (T3 and T4), which are critical for metabolism, growth, and development. High TSH Levels: Elevated TSH usually indicates an underactive thyroid (hypothyroidism), where the thyroid gland isn't producing enough hormones, prompting the pituitary to produce more TSH to stimulate the thyroid. Low TSH Levels: Low levels often suggest an overactive thyroid (hyperthyroidism), where excessive thyroid hormone production suppresses TSH release from the pituitary gland.

  • Total T4
    Total T4, or total thyroxine, is a blood test that measures the overall level of thyroxine, a primary hormone produced by the thyroid gland. Thyroxine plays a crucial role in regulating metabolism, growth, and development. Elevated levels can indicate hyperthyroidism, a condition where the thyroid gland is overactive. This can be due to Graves' disease, thyroiditis, or taking too much thyroid hormone medication. Lower levels suggest hypothyroidism, where the thyroid gland is underactive. This can be caused by Hashimoto's thyroiditis, thyroid removal, or certain medications. Total T4 testing is commonly used to assess thyroid function, alongside other thyroid tests like TSH and Free T3, to diagnose and monitor thyroid disorders.

  • Triglycerides
    Triglycerides are a type of fat found in the blood. When you eat, your body converts any calories it doesn't need to use right away into triglycerides, which are stored in fat cells. • High Levels: High triglyceride levels can increase the risk of coronary artery disease. Elevated levels can be due to overweight/obesity, physical inactivity, cigarette smoking, excess alcohol consumption, a very high carbohydrate diet, certain diseases and medications, and genetic disorders. • Low Levels: Low triglyceride levels are generally not a concern and are typically seen as beneficial. However, extremely low levels can be a result of malnutrition, malabsorption, or hyperthyroidism.

How it Works

Choose one of our test packages according to your needs – whether this would be general health screening, nutritional state, sexual health or monitoring of a chronic condition and get it delivered to your home or office.


Perform the test at your comfort zone. This will require a fingerprick, swab of urine sample collection. Instructions will be included in your kit. Post it back to one of our accredited laboratories in a prepaid envelope.


We will notify you when results are available and you can access it in your dashboard together with advice from our health experts. Repeat tests as recommended and track results to keep your health in a good shape all the time.

Video tutorial

This video shows step-by-step guidance on how to use The Red Drop blood collection kits