To perform a serum iron test, a healthcare professional will insert a needle into a vein in your arm or hand and draw a small sample of blood. This sample will then be tested in a laboratory.

It has recently been proposed that the true upper normal limit of serum alanine aminotransferase (ALT) is much lower than that listed by the manufacturers of commercially available assays.

A high or paradoxically normal serum T3 may indicate hyperthyroidism ... a measurement of the total binding capacity for the hormone in that serum sample, and the equilibrium constant provide ...