warum bin ich so müde test — which blood markers matter?

Fatigue is a common but non-specific symptom with many potential causes: poor sleep, stress, anemia, thyroid dysfunction, vitamin deficiencies, or chronic inflammation. Blood tests can help identify organic contributors. Key markers include: complete blood count (especially hemoglobin and MCV for anemia), ferritin (iron stores), vitamin B12, vitamin D, TSH (thyroid function), and possibly CRP (inflammation). Fasting glucose and liver enzymes may also be relevant. However, normal lab results do not rule out fatigue – psychological factors, sleep quality, and lifestyle are equally important. Home blood tests can provide initial insights but are not diagnostic; abnormal results require clinical confirmation. Evidence for routine screening of all these markers in unexplained fatigue is moderate; clinical practice emphasizes targeted testing based on history. DNA tests for fatigue currently lack sufficient evidence and should not guide decisions.