wo kann man dna test machen — which blood markers matter?

DNA tests (e.g., from MyBody-X) can reveal genetic predispositions, such as for FADS1 (omega-3 metabolism) or APOA2 (fat sensitivity). However, the evidence is moderate – a single SNP should not be overinterpreted. Blood markers like ferritin, vitamin D, B12, hs-CRP, fasting glucose, and a full lipid panel (LDL, HDL, triglycerides) are more clinically relevant. For iron deficiency, ferritin is the key marker, but a doctor should interpret results because home tests are often less accurate than venous draws. Combining DNA and blood markers can provide hints, but it does not replace medical diagnosis. Especially with symptoms like fatigue or pallor, a medical workup is recommended.