Thyroid Blood Test

A thyroid blood test is a laboratory test that assesses the function of the thyroid gland by measuring various thyroid hormone levels in the blood. The thyroid is a small gland located in the neck, and it plays a crucial role in regulating metabolism and maintaining overall health. The primary hormones produced by the thyroid are thyroxine (T4) and triiodothyronine (T3), and their production is influenced by thyroid-stimulating hormone (TSH), which is produced by the pituitary gland.

Sample type:  Blood
Preparation:  Fasting is not required.

Price: $74


The Thyroid Blood Test, conducted through a comprehensive blood panel, offers a detailed glimpse into the intricate balance of thyroid hormones crucial for overall health. Nestled in the neck, the thyroid gland orchestrates metabolism and energy regulation, making its assessment instrumental in understanding and managing various health conditions.

T3 Uptake (Triiodothyronine Uptake):

    • T3 uptake is a laboratory test that measures the amount of binding sites on proteins in the blood that are available to bind with T3 (triiodothyronine), one of the thyroid hormones.
    • It indirectly assesses thyroid function by estimating the availability of binding sites for thyroid hormones in the bloodstream.
    • T3 uptake results are often interpreted in conjunction with other thyroid function tests to evaluate overall thyroid health.

T3 (Triiodothyronine):

    • T3 is one of the two main thyroid hormones produced by the thyroid gland, along with T4 (thyroxine).
    • T3 plays a crucial role in regulating metabolism, growth, and development in the body.
    • Measuring T3 levels in the blood helps assess thyroid function and diagnose thyroid disorders such as hyperthyroidism or hypothyroidism.

TSH (Thyroid-Stimulating Hormone):

    • TSH is a hormone produced by the pituitary gland that stimulates the thyroid gland to produce thyroid hormones (T3 and T4).
    • TSH levels are often measured to assess thyroid function and screen for thyroid disorders.
    • Elevated TSH levels usually indicate hypothyroidism (underactive thyroid), while low TSH levels may suggest hyperthyroidism (overactive thyroid).

Total T4 (Total Thyroxine):

    • Total T4 measures the total amount of thyroxine (T4), the main thyroid hormone produced by the thyroid gland, circulating in the blood.
    • T4 plays a crucial role in regulating metabolism, energy production, and various physiological functions.
    • Measuring total T4 levels helps evaluate thyroid function and diagnose thyroid disorders, along with other thyroid function tests.