Definition
A radioimmunoassay (RIA) is a highly sensitive laboratory technique used to measure the concentration of a substance by using antibodies and radioactive tracers. It's like a super-powered version of an immunoassay, adding radioactive elements to enhance detection. The radioactive tracer allows scientists to detect even tiny amounts of the target substance. RIAs are used in various fields, including medicine, endocrinology, and pharmacology. They can measure hormones, drugs, and other biologically important molecules. Though sensitive, RIAs are being replaced by non-radioactive methods due to safety concerns with radioactive materials. Still, it remains an important technique. ☢️