welche blutwerte bei müdigkeit testen — can a DNA test help?

When investigating fatigue, standard blood tests are essential: complete blood count (anemia), ferritin and iron (iron deficiency), vitamin B12, folate, vitamin D, thyroid function (TSH, fT3, fT4), inflammatory markers (CRP), and sometimes glucose and liver enzymes. A DNA test (e.g., MyBody-X) cannot replace these current lab values. It can only indicate genetic predispositions, such as variants in MTHFR affecting folate metabolism or in genes related to B12 transport or iron regulation. However, the evidence for translating these SNPs into actionable clinical advice is weak to moderate. DNA tests do not diagnose fatigue; they provide potential clues that must be interpreted alongside blood results and clinical evaluation. Without actual lab data, genetic information remains speculative. Be cautious of overblown claims: fatigue has many causes (sleep, stress, diet, infections) that a DNA test cannot capture. Recommendation: start with a medical workup and blood tests, then consider targeted genetic insights if clinically indicated.