Immunglobulin G

Immunoglobulin G (IgG) is a type of antibody that plays a crucial role in the body's immune response by identifying and neutralizing foreign objects like bacteria and viruses. It is the most abundant type of antibody found in blood circulation. Researchers have observed that IgG is involved in various immune processes, including the activation of other immune cells and the facilitation of phagocytosis. Clinically, IgG levels are significant as they can reflect the state of an individual's immune system. Elevated IgG levels may indicate chronic infections, autoimmune diseases, or chronic inflammation, while low levels can suggest immunodeficiency or acute infection. In the context of athletic performance and biohacking, IgG is relevant as it can indicate the body's ability to respond to infections and recover from physical stress. For longevity, maintaining balanced IgG levels is associated with healthy aging, as researchers have found that changes in IgG glycosylation patterns are linked to inflammaging. Caveats in measuring IgG include potential confounders such as recent infections or vaccinations, which can temporarily alter IgG levels. Additionally, IgG levels can vary with age and sex, and certain medications may interfere with accurate measurement.