Evidence check: IgG Unverträglichkeitstest in the context of skin aging

IgG food intolerance tests are often marketed for skin aging, but the scientific evidence is weak. IgG antibodies against foods typically reflect normal immune exposure, not intolerance or allergy. No robust studies link IgG test results to skin aging. Skin aging is driven by UV exposure, oxidative stress, collagen degradation, and genetics. While diet influences skin health (e.g., high sugar accelerates glycation), IgG testing is not a validated method to guide anti-aging nutrition. Major allergy and immunology societies (e.g., EAACI, DGAKI) advise against using IgG tests for diagnosing food intolerances. In the context of skin aging, these tests are a marketing tool without credible evidence. For skin health, focus on a balanced diet rich in antioxidants, sun protection, and evidence-based skincare.