Can IgG Unverträglichkeitstest help with Sport?

IgG food intolerance tests are often marketed to athletes as a way to identify performance-hindering foods. However, the scientific evidence is very weak. IgG antibodies to foods are usually a normal immune response to consumed proteins and do not reliably indicate intolerance or allergy. Studies show no consistent improvement in athletic performance, recovery, or inflammatory markers from IgG-based elimination diets. These tests are not recommended by medical or sports nutrition societies and can lead to unnecessary dietary restrictions and nutrient deficiencies. For athletes, general nutrition principles—adequate carbohydrate and protein intake, and individual tolerance (e.g., lactose, FODMAPs)—are more relevant. Conclusion: IgG tests have no evidence-based role in sports.