What to watch with DNA Stoffwechseltest and fatigue?

When using a DNA metabolism test for fatigue, caution is warranted. Most variants tested (e.g., MTHFR, COMT, FTO) have weak or inconsistent evidence linking them directly to fatigue. Fatigue is highly multifactorial – sleep deprivation, stress, thyroid dysfunction, iron deficiency, and mental health are often more impactful. A DNA test may suggest metabolic tendencies (e.g., slower methylation), but it cannot diagnose or prescribe. The evidence for nutrigenetic approaches to fatigue is mostly mechanistic or observational, lacking robust RCTs. Marketing claims that a test can reveal the 'perfect anti-fatigue diet' are overblown. A more evidence-based approach includes clinical blood work (iron, B12, vitamin D, TSH) and lifestyle assessment. The test can serve as inspiration, not medical guidance. Always consult a doctor before making significant changes based on genetic results.