Can IgG help with longevity?

Whether immunoglobulin G (IgG) can promote longevity is not addressed in the provided context. IgG is a key antibody of the adaptive immune system, essential for fighting infections and modulating immune responses. Some mechanistic theories suggest that balanced immune function supports healthy aging, but direct evidence linking IgG levels or supplementation to increased lifespan is lacking. The given context covers DNA tests for glycation, collagen, microbiome, and metabolic markers, but not IgG. Longevity is influenced by genetics, diet, exercise, and inflammation status. While IgG levels may fluctuate with chronic inflammation or infection, whether manipulating IgG (e.g., via supplements) extends lifespan remains speculative. Evidence grade: unclear. No valid sources in context. Consumers should be cautious of marketing claims that portray IgG as a longevity 'miracle.'