welche blutwerte sind wichtig bei müdigkeit — what are common causes?

Fatigue is a common symptom with many potential causes, from lifestyle factors to underlying medical conditions. Key blood tests that are clinically recommended for unexplained fatigue include: complete blood count (to check for anemia), ferritin (iron stores), vitamin B12, folate, vitamin D, TSH (thyroid function), fasting glucose, and sometimes inflammatory markers like CRP. Liver/kidney function and electrolytes may also be relevant. Deficiencies in iron, B12, or vitamin D are frequent and treatable. However, fatigue is non-specific; a single blood panel cannot replace a thorough history including sleep, stress, and mental health. The evidence for these markers is strong (clinical guidelines), but the provided context does not contain specific blood values for fatigue. Caveat: consumer lab tests without medical oversight risk misinterpretation.