Is IgG Unverträglichkeitstest useful for skin aging?

IgG food intolerance tests are often marketed for digestive issues or 'food sensitivity,' but not for skin aging. The scientific evidence linking IgG antibodies to skin aging is very weak. Skin aging is primarily driven by UV exposure, oxidative stress, genetics, and lifestyle factors like diet and sleep. IgG tests merely measure an immune response to foods, often without clinical relevance. Medical guidelines advise against using such tests for diagnosing food intolerances. Therefore, their usefulness for skin aging is speculative and not evidence-based. A balanced diet and sun protection are proven to be more effective.