Compounds used for treating a disease and for improving the health of human beings are called therapeutic agents. Recombinant DNA technology has revolutionised health care by facilitating the large-scale biological production of a variety of safe, pure, and efficient human proteins.

Since these recombinant therapeutics produced are identical to the natural human proteins unlike those isolated from animals (like cow and pig), they do not induce immune responses and are free from threat of any allergic responses.

Presently, numerous products, like antibiotics, monoclonal antibodies, blood clotting factors, hormones (insulin and growth hormone), cytokines, and vaccines are being produced for human welfare.