THYROID PROFILE, FREE

The Thyroid Profile Free test measures the level of following hormones in the blood 

1. Triiodothyronine (T3) - Free 
2. Thyroxine (T4) - Free 
3. Thyroid Stimulating Hormone (TSH) 

The triiodothyronine (T3) and thyroxine (T4) hormones are present in the blood in two forms: 

• Bound Form: The thyroid hormones are bound to proteins present in blood and this prevents them from entering the body tissues.  
• Free Form: The thyroid hormones that are readily available for the body tissues. 

The free triiodothyronine (T3) and thyroxine (T4) includes only free forms present in the blood. 

The Thyroid Profile Free test is most commonly used  

• As part of a routine health checkup 
• Diagnose thyroid disorders such as hypothyroidism, hyperthyroidism, graves’ disease, or hashimoto’s disease 
• Monitor treatment for thyroid disorders 
• Diagnose the cause of infertility 
• Evaluate a thyroid nodule or goitre 

A healthcare professional will draw a blood sample from a vein in the arm. 

No special preparation is required for the blood draw. 

The Thyroid Profile Free test is a safe, standard test with very minimal risks involved such as 

• Bleeding 
• Light headedness 
• Infection 
• Bruising 

The Thyroid Profile Free test normal ranges may vary slightly among different laboratories.  

The doctor will evaluate the results based on health, gender, age, medical history, and other factors. 

High levels of thyroid hormones in the blood can cause symptoms such as weight loss, anxiety, muscle weakness, racing heart, or heat intolerance. 

Low levels of thyroid hormones in the blood can cause symptoms such as weight gain, fatigue, enlarged thyroid gland, irregular menstrual periods, cold intolerance, or depression.