Is FOXO3 useful for Müdigkeit?

Whether FOXO3 is useful for fatigue is not well-supported by current evidence. FOXO3 is a transcription factor involved in cellular stress resistance, autophagy, and longevity. Some GWAS and mechanistic studies suggest links to energy metabolism and mitochondrial function, which could theoretically affect fatigue. However, direct clinical evidence linking FOXO3 variants to fatigue in humans is lacking. The effect sizes are small, and lifestyle factors (sleep, diet, exercise, stress) are far more influential. A DNA test for FOXO3 (e.g., rs2802292) cannot diagnose or explain fatigue. MyBody-X does not currently offer a dedicated FOXO3 analysis; if a related SNP is included, interpret it with caution. Persistent fatigue should be evaluated by a physician for common causes like thyroid disorders, iron deficiency, or sleep apnea. Relying on a single gene for fatigue is not evidence-based.