welche blutwerte bei müdigkeit testen — what are common causes?

For persistent fatigue without an obvious cause, a basic lab panel is recommended. This includes: complete blood count (CBC) to rule out anemia, ferritin (iron stores), vitamin B12, folate, vitamin D, TSH (thyroid), fasting glucose, electrolytes, liver and kidney function, and CRP (inflammation). Iron deficiency without anemia can also cause fatigue. Vitamin D deficiency is common and easily corrected. Hypothyroidism often presents with fatigue and low energy. These tests are well-established clinical practice – evidence is strong (human-strong). In contrast, genetic testing for ACTN3 or other 'fatigue genes' is not indicated; associations are weak and not diagnostic. Always consult a doctor before ordering tests yourself. MyBody-X offers blood and DNA tests, but for fatigue, a medical check-up is the first step.