NutriCheck I Unverträglichkeits-Test: which diet helps?

The NutriCheck I Intolerance Test is a commercial test that often measures IgG antibodies against foods. Scientific evidence for such tests is weak: IgG levels typically reflect normal immune exposure, not true intolerance. A diet based on these results (e.g., avoiding 'positive' foods) may lead to short-term subjective improvement, but placebo effects and elimination of entire food groups carry risks like nutrient deficiencies. Guidelines recommend a medically supervised elimination diet followed by controlled provocation (e.g., for lactose, fructose, or histamine intolerance). The NutriCheck I does not replace medical diagnosis. If you still use such a test, interpret results critically and consult a doctor or dietitian before making major dietary changes.