Is IgG useful for Langlebigkeit?

The question of whether IgG testing is useful for longevity is often promoted by direct-to-consumer labs, especially in the context of food sensitivities. However, the scientific evidence is weak. IgG antibodies against foods are typically a sign of normal immune exposure, not pathology. Studies show that IgG-based elimination diets rarely produce reliable clinical improvements and often lead to unnecessary restrictions. For longevity, established biomarkers such as inflammatory markers (CRP, IL-6), metabolic parameters, and telomere length are more relevant. IgG testing may be useful only in specific clinical contexts (e.g., suspected chronic infections or autoimmune conditions), not as a general longevity screening. The evidence is therefore best classified as marketing or unclear. Caveat: misinterpretation can lead to malnutrition and increased health anxiety. Consult a physician before adopting an IgG-based diet.