Evidence check: Zink in the context of Müdigkeit

The provided context does not contain specific evidence on zinc and fatigue. Zinc is an essential trace mineral involved in immune function and cell division. Deficiency can cause fatigue, but evidence for supplementation in non-deficient individuals is weak. Consumer DNA tests for zinc-related genes (e.g., SLC30A8) are not clinically validated to predict or treat fatigue. A serum zinc test is more informative. Caution: high zinc doses (>40 mg/day) can cause copper deficiency. Overall evidence is moderate – observational studies exist, but robust RCTs showing zinc reduces fatigue are lacking. Supplementation is not recommended without confirmed deficiency.