RIA (Radioimmunoassay)

Radioimmunoassay (RIA) is a sensitive laboratory technique used to measure tiny amounts of substances, such as hormones or drugs, in the blood. It works by combining a specific antibody with a radiolabeled version of the substance being measured. When a sample containing the same substance is added, it competes with the radiolabeled version for antibody binding. By measuring the radioactivity, scientists can determine the amount of the substance present in the sample. RIA is highly precise and useful for diagnosing diseases, monitoring treatment, and conducting research.