FT4, or Free Thyroxine, is the active form of thyroid hormone that circulates freely in the bloodstream. It plays a critical role in regulating metabolism, growth, and energy levels throughout the body. Abnormal FT4 levels can indicate thyroid disorders such as hypothyroidism or hyperthyroidism.

The FT4 test measures Free Thyroxine, the active form of thyroid hormone that circulates freely in the bloodstream and is essential for regulating metabolism, growth, and energy levels. Unlike Total Thyroxine (T4), which includes both bound and unbound forms, FT4 specifically measures the biologically active fraction that is readily available to enter cells and exert its effects.

FT4 levels are influenced by the hypothalamus, pituitary gland, and thyroid gland through a feedback loop involving Thyroid-Stimulating Hormone (TSH). Elevated FT4 levels may indicate hyperthyroidism, where the thyroid gland is overactive, leading to symptoms such as weight loss, rapid heartbeat, and heat intolerance. Conversely, low FT4 levels may suggest hypothyroidism, characterized by symptoms like fatigue, weight gain, and cold intolerance.

The FT4 test is crucial for diagnosing thyroid disorders, monitoring thyroid function, and guiding treatment decisions. It helps differentiate between primary thyroid disorders and other conditions affecting thyroid hormone levels. Regular monitoring of FT4 levels is essential for individuals with thyroid conditions to ensure optimal management and adjustment of medication dosages to maintain thyroid hormone balance and overall health.

We provide blood tests in Noida, Gurgaon, Faridabad, Delhi, Indirapuram, Ghaziabad, , Greater Noida, and Greater Noida Extension(west).