What should I know about was kann man im blut alles feststellen?

Blood tests can detect a wide range of biomarkers – from standard clinical parameters (lipids, glucose, liver/kidney function, inflammatory markers like CRP) to hormones, vitamins, trace elements, and genetic variants analyzed from DNA in blood cells. Providers like MyBody-X use blood samples to assess both current metabolic status (e.g., vitamin D levels, homocysteine) and genetic predispositions (e.g., MTHFR variants for folate metabolism, ACTN3 for muscle fiber type). The evidence is mixed: routine clinical markers are well-validated, but genetic risk scores often have small effect sizes and are ancestry-dependent (e.g., ACTN3 R-allele: small effects, ancestry-dependent; PMC11529235, PMC4993134). Biomarkers for longevity or athletic performance have limited predictive power – higher VO₂max is associated with reduced mortality (PMID:40520885, 34321526), but a single blood value cannot provide an individual prognosis. Important: blood tests do not replace medical diagnosis. Results should always be interpreted in the context of lifestyle, symptoms, and medical advice. Especially for abnormal values (e.g., elevated homocysteine with MTHFR variants), clinical follow-up is necessary. MyBody-X labels its analyses as lifestyle information, not medical diagnosis.