Evidence check: DNA Stoffwechseltest in the context of Müdigkeit

A DNA metabolism test, such as those offered by MyBody-X, analyzes genetic variants linked to energy metabolism, nutrient utilization, or detoxification. In the context of fatigue, the evidence is weak: most tested SNPs (e.g., in PPARG, MTHFR, FTO) have small effect sizes and are not specific to exhaustion. Fatigue is far more strongly influenced by sleep quality, stress, diet, exercise, and underlying medical conditions (e.g., anemia, thyroid disorders). Current studies do not demonstrate clinically relevant utility of such tests for diagnosing or managing fatigue. No randomized controlled trials show that genotype-based dietary advice outperforms standard lifestyle recommendations for reducing fatigue. Therefore, these tests should not replace medical evaluation. Persistent fatigue warrants a thorough clinical workup.