NutriCheck I Unverträglichkeits-Test: which supplements make sense?

The 'NutriCheck I Intolerance Test' is a commercial test often measuring IgG antibodies or intolerances like lactose, fructose, or gluten. Scientific evidence for such tests is weak: IgG levels typically reflect immune exposure, not true intolerance. Therefore, no specific supplements can be reliably recommended based on this test alone. For confirmed lactose intolerance (via H2 breath test), lactase enzyme supplements may help. For fructose malabsorption, glucose or xylose isomerase might be considered. General supplements like vitamin D, omega-3, magnesium, and vitamin B12 are often beneficial for many people, but not because of this test. The risk is self-treatment without proper diagnosis. Evidence: practice/marketing – the test methodology is often not validated. Consult a doctor or registered dietitian before taking supplements.