How are IgG Unverträglichkeitstest and skin aging related?

There is no scientifically established direct relationship between IgG food sensitivity tests and skin aging. IgG tests (e.g., for foods) are considered not validated for diagnosing food intolerances by major allergy and immunology societies (e.g., EAACI, AAAAI). They measure IgG antibodies, which often reflect normal immune exposure to foods, not intolerance. Skin aging is driven by UV radiation, oxidative stress, glycation, collagen degradation, and chronic inflammation. Some companies claim that IgG-mediated food reactions cause systemic inflammation that accelerates skin aging, but this cascade lacks controlled clinical evidence. No randomized trials show that an IgG-test-based diet measurably slows skin aging. The evidence is limited to marketing claims. To reduce skin aging, focus on proven strategies: sun protection, dietary antioxidants (not high-dose supplements), adequate sleep, and an overall anti-inflammatory diet. An IgG test is neither necessary nor helpful for this goal. Caveat: The test may lead to unnecessary dietary restrictions and nutrient deficiencies.