Immunoglobulins (Ig), also known as antibodies, are glycoproteins produced by B cells (a type of white blood cell) in response to foreign invaders such as bacteria, viruses, fungi, and toxins.
Immunoglobulins are essential components of the immune system, providing the body with a defense against infections. They are involved in neutralizing pathogens, activating immune cells, and initiating the complement system. Immunoglobulin therapies are important treatments for a range of immune system disorders, including immunodeficiencies, autoimmune diseases, and infectious diseases.