Is DNA Stoffwechseltest useful for Müdigkeit?

DNA metabolism tests analyze genetic variants that could theoretically influence energy metabolism (e.g., MTHFR, COMT). However, the scientific evidence for a direct benefit in fatigue is weak. Individual gene effects are small, and fatigue has many causes (sleep deprivation, stress, diet, medical conditions). These tests are designed as lifestyle products, not medical diagnostics. They cannot replace a clinical evaluation, especially for persistent or unexplained fatigue. Pediatric safety data are lacking. A meta-analysis (BMJ 2016) found no significant FTO-diet interaction for weight loss, highlighting the limited clinical relevance of such genetic tests. Consumers should have realistic expectations: results may inspire healthier habits but do not provide a precise cause. For chronic fatigue, a medical workup (blood count, thyroid, vitamin levels) is more appropriate.