welche blutwerte sind wichtig bei müdigkeit — can a DNA test help?

For fatigue, key blood markers include iron (ferritin, hemoglobin), vitamin B12, vitamin D, thyroid function (TSH, fT3, fT4), and possibly inflammatory markers (CRP). A DNA test can provide supplementary clues – for example, variants in MTHFR (folate metabolism), VDR (vitamin D receptor), or HFE (iron overload). However, the evidence is mostly mechanistic or observational; direct clinical recommendations are rarely justified. Many DTC DNA tests overstate the predictive power of single SNPs. For fatigue workup, standard blood panels and medical evaluation are far more reliable. A DNA test may serve as an additional puzzle piece but does not replace clinical assessment. Be cautious of exaggerated claims: the effect of individual genes on fatigue is typically small and modifiable by lifestyle.