What to watch with IgG Unverträglichkeitstest and Sport?

IgG food intolerance tests are often marketed to optimize diet, including for athletes. However, the scientific evidence is weak: IgG antibodies merely indicate immune exposure, not intolerance or allergy. A positive IgG result can reflect normal immune responses after eating a food and often leads to unnecessary dietary restrictions. For athletes, who need balanced nutrition for performance, this can be counterproductive—e.g., avoiding important carbohydrate or protein sources. Instead, athletes should rely on validated methods like food diaries, blood biomarkers (e.g., inflammation markers), and individual tolerance. An IgG test does not replace medical diagnosis for real intolerances like lactose intolerance or celiac disease. Bottom line: be skeptical, avoid drastic diet changes without professional guidance.