Therapeutic proteins are a class of biopharmaceuticals made up of naturally occurring proteins or those engineered in the laboratory for therapeutic purposes. These proteins can be used to treat a wide range of diseases and conditions, including cancer, autoimmune disorders, and genetic disorders. They are often used to replace or supplement proteins that are deficient or malfunctioning in the body, and can be administered through injection, infusion, or oral delivery. Therapeutic proteins have revolutionized the treatment of many diseases and are a rapidly growing area of research and development in the pharmaceutical industry.