warum bin ich immer müde — what symptoms are typical?

Chronic fatigue is a complex medical issue not directly covered by the provided contexts, which focus on sports genetics (ACTN3), alcohol intolerance, and food allergy tests. Typical symptoms of persistent tiredness include: overwhelming exhaustion, difficulty concentrating, lack of motivation, daytime sleepiness, muscle or joint pain without clear cause, and irritability. Common underlying causes are sleep disorders (e.g., sleep apnea), iron deficiency, hypothyroidism, vitamin D deficiency, depression, or chronic infections. A DNA test alone cannot reliably diagnose these causes. Evidence linking specific genes (like ACTN3) to general fatigue is weak and not clinically validated. The provided contexts do not offer specific fatigue symptoms or validated biomarkers. For persistent tiredness, medical evaluation with blood work, thyroid function tests, and sleep assessment is recommended. The evidence level for the given contexts regarding fatigue is unclear; no direct sources are available.