TriIodothyronine Free

Test Results & Interpretations

Overview of TriIodothyronine Free

Test Description

Also known as FT3 or total triiodothyronine test, it is used to measure the unbound and free T3 levels present in the bloodstream of the body. The test assesses the functioning of the thyroid gland to help diagnose hyperthyroidism, hypothyroidism or other thyroid disorders.

Why Get Tested

The FT3 test is used to evaluate the thyroid gland function, to diagnose disorders like hyperthyroidism which has symptoms like nervousness, tremors, insomnia, weight loss and swollen eyes. It also diagnoses hypothyroidism with symptoms like weight gain, slow metabolism, dry skin, constipation and fatigue. FT3 test also monitors the effectiveness of the thyroid treatment.


  • Do not eat or drink anything other than water for 8-12 hours before the test.

What Results of TriIodothyronine Free mean?


The results show either excessively high or low levels of free T3 in the blood samples. The normal range for free T3 is from 1.8 to 5.4 mcg/dl for men and women of all age groups.

Provided By




We focus on providing patients quality diagnostic healthcare services in India. Through our network, we offer patients convenient locations for their diagnostic healthcare services and efficient service. With over 3368 diagnostic and related healthcare tests and services offered, we believe we are capable of performing substantially all of the diagnostic healthcare tests and services currently prescribed by physicians in India. Our key competitive strengths are: Business model focused on the patient as a customer and an established consumer healthcare brand associated with quality services, in a market where patients generally choose their diagnostic healthcare service provider. Well-positioned to leverage upon one of the fastest-growing segments of the Indian healthcare industry. A network whose growth yields greater economies of scale, combined with a hub and spoke model that is scalable for further growth. Centralized information technology platform that fully integrates our network and is scalable. Attractive financial performance, financial profile and return on invested capital. Experienced leadership team with strong industry expertise and successful track record. Some of our laboratories have achieved International Organization for Standardization, or ISO, certification for their quality systems. Our National Reference Laboratory has obtained ISO 9001:2008 certification (for the performance of routine and advanced diagnostic pathology testing services, including clinical trials), ISO 15189:2007 (for quality management in medical laboratories), ISO 15189:2012 certification (in the field of medical testing) and ISO 27001:2013 certification (for establishing an effective information management system that maintains and processes information security at our data center).

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