What role does IgG play in skin aging?

The role of IgG in skin aging is not well-established in the scientific literature. IgG antibodies are part of the adaptive immune system and may contribute to chronic low-grade inflammation (inflammaging), which is linked to skin aging. Some mechanistic studies suggest that IgG autoantibodies against collagen or elastin could impair skin structure, but human evidence is limited and inconsistent. The provided context does not address IgG and skin aging specifically. Therefore, any claims about IgG testing for skin aging should be viewed skeptically. Skin aging is multifactorial, with UV exposure, lifestyle, and genetics playing larger roles. IgG levels are not a validated biomarker for skin aging. For personalized advice, consult a dermatologist or immunologist.