Myths vs facts: Fitness Vitality DNA and Müdigkeit

The myth is that a 'Fitness Vitality DNA' test can pinpoint the exact cause of fatigue and prescribe a personalized diet or training plan. The fact: DNA tests analyze single nucleotide polymorphisms (e.g., MTHFR, FTO, GCKR) linked to metabolism, nutrient processing, or energy regulation. However, effect sizes are small and heavily modulated by lifestyle, environment, and epigenetics. Fatigue has many drivers – vitamin deficiencies (B12, D, iron), hormonal imbalances (cortisol, thyroid), poor sleep, or stress. A DNA test can only suggest probabilistic tendencies, not diagnose. Evidence comes from observational studies and GWAS; randomized controlled trials are lacking. Thus, the test is a conversation starter, not a medical tool. Safety note: persistent fatigue warrants a doctor’s visit, especially in children or athletes. Results are ancestry-dependent and should not replace clinical assessment.