Verywell Health on MSN1y
What Is T4? Thyroxine Test and What It Means
Eun Lee, MD If your healthcare provider has ordered a T4 test, you may wonder what it is. Thyroxine is another name for T4, ...
Medscape8d
Free Thyroxine (FT4) and Free Triiodothyronine (FT3) Estimate Tests
Most of the free hormone immunoassays in current use employ a specific, high affinity hormone antibody to sequester a small amount of total hormone from the specimen. The unoccupied antibody ...