The free thyroxine test (FT4), also known as a free T4 test, determines the amount of free thyroxine in your blood. T4 circulates in two forms in the blood: free morpheme (FT4) and bound morpheme. As a result, the T4 hormone is frequently tested as free T4 or total T4. Many laboratories conduct safe home collection for the FT4 thyroxine test in Delhi. Total T4 contains both the bound and hence free forms circulating in the bloodstream and may be affected by the amount of protein in the blood to bind to them. The cost for an FT4 test in Delhi varies based on location and facility. No specific measures, such as fasting, must be taken before getting a free thyroxine test in Delhi.