hormone indicating thyroid function by measuring unbound thyroxine
Free Thyroxine (FT4) is a hormone produced by the thyroid gland that plays a crucial role in regulating metabolism, energy production, and overall growth and development. Unlike total thyroxine, which includes both bound and unbound hormone, FT4 measures the unbound portion that is biologically active and available to tissues, making it a more accurate indicator of thyroid function.