Thyroid Profile Free (FT3, FT4 & TSH) near me in Thane

Also referred as

Thyroid Function Test-Free

For women

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Thyroid Profile Free (FT3, FT4 & TSH) is a group of blood tests that assesses the health of your thyroid gland and aids in the diagnosis and management of thyroid disorders. It is available at an affordable price in Thane with Tata 1mg labs. This profile measures the amount of free form of thyroid hormones in the blood, namely thyroid stimulating hormone (TSH), thyroxine (T4) - free, and triiodothyronine (T3) - free.

Your doctor may suggest Thyroid Profile Free (FT3, FT4 & TSH) when you have symptoms suggestive of a thyroid disorder, such as tiredness, mood swings, depression, muscle pain, nervousness, or anxiety. The test results, along with your symptoms, will allow the doctor to identify and diagnose certain diseases, such as hyper or hypothyroidism, and also manage the treatment for these diseases.

No special preparations are needed for Thyroid Profile Free (FT3, FT4 & TSH) test. You may eat and drink as per your daily routine. On the day of the test, individuals on thyroid medications should take them at the time and dosage prescribed by their doctors.

Samples required

Blood

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Preparations

No special preparation is required.

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Understanding Thyroid Profile Free (FT3, FT4 & TSH)

The thyroid gland is a butterfly-shaped organ located in the neck that produces hormones like thyroxine (T4) and triiodothyronine (T3), which are responsible for regulating metabolism and other bodily functions. The production and release of these hormones are controlled by the thyroid-stimulating hormone (TSH), which is produced by the pituitary gland.

A Thyroid Profile Free (FT3, FT4 & TSH) test is used to assess how well your thyroid gland is working and aid in the diagnosis and management of thyroid disorders, such as an overactive thyroid gland (hyperthyroidism) or an underactive thyroid gland (hypothyroidism). Your doctor may advise this test if you show any symptoms suggestive of hyperthyroidism, such as weight loss, nervousness, irritability, increased sweating, and rapid heartbeat, or hypothyroidism, such as weight gain, fatigue, sensitivity to cold, constipation, and dry skin. It is also important for pregnant women to have healthy amounts of thyroid hormones to ensure the healthy development of their babies. Therefore, screening with a TFT-Free test may be recommended for pregnant women.

No special preparations are needed for this test. Usually, you do not need to stop taking your thyroid medication before taking this test. However, let your doctor know about all the medications you take as some of them can affect thyroid function. Biotin (Vitamin B7) is a commonly taken over-the-counter supplement that can lead to some aberrancy in your thyroid function test results even when the values are normal. Therefore, avoid taking biotin two days before this test.

Test result ranges are approximate and may differ slightly between different labs depending on the methodology and laboratory guidelines. The test results will help the doctor determine your medical condition, make recommendations for lifestyle modifications such as diet and exercise, decide whether or not medication will be required to manage your condition, and formulate your overall treatment plan.

What does Thyroid Profile Free (FT3, FT4 & TSH) measure?

Contains 3 tests

A Thyroid Profile Free (FT3, FT4 & TSH) measures the levels of three hormones in the blood, namely triiodothyronine hormone (T3) free, thyroxine hormone (T4) free, and thyroid-stimulating hormone (TSH). T3 and T4 are thyroid hormones that help regulate metabolism and energy levels in the body. On the other hand, TSH is produced by the pituitary gland and stimulates the thyroid gland to produce T3 and T4 hormones. T3 and T4 circulate in the blood in two forms: bound (attached to proteins) and free (does not attach to any protein). The serum levels of the thyroid hormones and TSH have an inverse relationship, i.e., low T4 (as observed in hypothyroidism) and high T4 (as seen in hyperthyroidism) levels are associated with high and low TSH levels, respectively.

TSH (Thyroid Stimulating Hormone) Ultrasensitive

A TSH (Thyroid Stimulating Hormone) Ultrasensitive test measures the levels of TSH hormone in the blood. TSH is produced by the pituitary gland located in the brain. Its function is to stimulate and regulate the functioning of the thyroid gland. It signals the thyroid gland to increase or decrease the production of thyroid hormones T3 and T4 (essential for regulating our body’s metabolism, temperature, heart rate, and growth) when their levels are low or high, respectively. Therefore, when the levels of T3 & T4 decrease, the pituitary gland is stimulated to release TSH. This high TSH level in turn stimulates the thyroid gland to release more thyroid hormones (T3 & T4); the vice-versa happens when the levels of thyroid hormones increase.

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Thyroxine - Free

A Thyroxine - Free test measures the free form of thyroxine (T4) hormone made by the thyroid gland. T4 hormone exists in the blood in two forms: bound (attached to proteins) and free (not attached to proteins). Most of the T4 hormone circulating in the blood is bound to proteins and only a small part is free. A delicate balance of bound and free T4 should be maintained to ensure the proper functioning of the body.

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Triiodothyronine Free

A Triiodothyronine Free test measures the levels of free triiodothyronine (T3), a hormone that is produced by the thyroid gland. T3 hormone plays an important role in regulating the body's metabolism, energy levels, and growth & development. It exists in the blood in two forms: free T3 and bound T3. Only a small portion of T3 is in the free form (not bound to proteins) and can be utilized by the body’s tissues, whereas more than 99% T3 is bound to proteins, such as albumin and thyroid-binding globulin (TBG), which prevent it from entering into the tissues. The body maintains a balance between bound and free T3 to ensure proper functioning.

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Content created by

Dr. Swati Gupta (Anand)

MBBS, MD Lab Medicine

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Last Updated

29th Jan 2026