Nährstoffcheck: which supplements make sense?

A nutrient check should not rely solely on genetic tests but combine symptoms, dietary analysis, and blood work. DNA tests indicate predispositions, not current status – effect sizes are often small and population-dependent. Microbiome tests can hint at gut health, but evidence linking specific bacteria to nutrient deficiencies is mixed. A targeted blood panel (e.g., vitamin D, B12, ferritin, zinc) after consulting a doctor is more reliable. Supplements should only be taken when a deficiency is confirmed or risk is high (e.g., pregnancy, vegan diet). Beware of marketing hype: tests alone do not replace medical diagnosis.