Thyroid Function Test

What is the Thyroid Function Test?

The Thyroid Function Test is a blood test that measures the levels of various hormones produced by the thyroid gland. These hormones play a crucial role in regulating your metabolism, energy levels, and overall well-being.

What is it Used For?

This test helps evaluate the functioning of your thyroid gland. It can identify if your thyroid is producing too much hormone (hyperthyroidism) or too little hormone (hypothyroidism), which can have a significant impact on your health.

What the Test Measures:

  • TSH (Thyroid-Stimulating Hormone): TSH regulates the production of thyroid hormones. Abnormal levels can indicate an overactive or underactive thyroid.
  • Free T4 (Thyroxine) and Free T3 (Triiodothyronine): These unbound hormones are responsible for controlling metabolism, energy, and growth.
  • Thyroid Antibodies: Testing for antibodies can help identify autoimmune thyroid conditions like Hashimoto's thyroiditis or Graves' disease.

Symptoms of Thyroid Imbalance:

Thyroid imbalances can cause a range of symptoms, including fatigue, weight changes, mood swings, hair loss, changes in heart rate, and more. Identifying these symptoms early through the test can lead to timely intervention and treatment.

Risk Factors:

Certain factors increase the risk of thyroid dysfunction, including family history, age, gender, autoimmune disorders, and radiation exposure.

Who Should Consider the Test?

  • Individuals experiencing symptoms of thyroid dysfunction, such as fatigue, weight changes, hair loss, or mood swings.
  • Individuals with a family history of thyroid disorders.
  • Those with a history of autoimmune diseases or other conditions affecting the thyroid.

The normal ranges:

  • TSH: 0.55 to 4.78 mIU/L
  • FT4: 11.5 to 22.7 pmol/L
  • FT3: 3.5 to 6.5 pmol/L