What is Albumin Test?
Albumin is a protein secreted by liver cells that enters the blood circulation after synthesis. It is the most abundant protein present in plasma. Its normal range is about 3.5 – 5 g/dl constituting more than half of the plasma protein.
Albumin controls the oncotic pressure in blood and helps to transport various substances like bilirubin, ions, fatty acids and certain drugs. These substances are called ligands.
Clinically, the Serum Albumin Test measures the functional capacity of the liver. It is a very basic medical laboratory procedure and bovine serum is used as the laboratory standard.
The Albumin Test is often combined with prothrombin time and the International Normalised Ratio (INR) test to assess the full biosynthetic capability of the liver.