What role does IgG play in menopause?

The role of immunoglobulin G (IgG) in menopause is not well established. IgG is the most abundant antibody in blood and a key player in humoral immunity. During menopause, declining estrogen levels can modulate immune function, and some studies report subtle shifts in IgG subclasses (especially IgG1 and IgG3). These changes may be linked to altered infection risk or autoimmune activity, but effect sizes are small and clinical significance remains uncertain. IgG testing is not part of standard menopause diagnostics. Evidence is mostly mechanistic or observational; large-scale clinical trials are lacking. Consumers should be cautious: at-home IgG tests are not validated for menopause-related immune assessment and cannot replace medical evaluation. There is no proven benefit of IgG monitoring for managing menopausal symptoms or long-term health outcomes.