welche blutwerte bei erschöpfung und müdigkeit — what symptoms are typical?

In clinical practice, common blood markers for exhaustion and fatigue include: complete blood count (hemoglobin, red blood cells) to rule out anemia, iron status (ferritin, transferrin saturation), vitamin B12, vitamin D, thyroid function (TSH, possibly free T3/T4), inflammatory markers (CRP), and liver/kidney function. Electrolytes like magnesium and calcium may also be relevant. However, evidence linking these markers to fatigue is mixed: while overt deficiency (e.g., B12 <200 pg/mL) is clearly associated, subclinical deficits often show weak or inconsistent correlations. The MyBody-X Fitness LifestyleCheck measures B12, D3, calcium, and HbA1c, but provides lifestyle insights, not medical diagnoses. Typical symptoms include persistent tiredness, lack of energy, difficulty concentrating, sleep disturbances, and muscle weakness. Importantly, blood values alone do not fully explain fatigue—psychological, social, and lifestyle factors are equally important. For persistent fatigue, consult a physician for clinical interpretation.