Biologic therapy, also known as biologic response modifier therapy, uses substances made from living organisms to treat diseases. It is commonly used in conditions like cancer, autoimmune disorders, and inflammatory diseases. These therapies work by targeting specific components of the immune system to enhance or restore its ability to fight disease. Unlike traditional medications, biologics are often more precise in their action, which can lead to fewer side effects. They can be derived from various sources, including human proteins, animal proteins, or recombinant DNA technology. This targeted approach helps improve treatment outcomes for many patients.