wie viel gene hat der mensch — which blood markers matter?

The number of human genes is not fixed; current annotations (e.g., GENCODE) list about 20,000–25,000 protein-coding genes plus many non-coding RNA genes. Regarding blood markers that matter, it depends on your health goals. Common evidence-based markers include fasting glucose, HbA1c, lipid panel (LDL, HDL, triglycerides), hs-CRP, vitamin D, ferritin, and TSH. Consumer tests (e.g., MyBody-X) may offer additional hormone or micronutrient panels, but clinical validation is often limited. Genetic variants like MTHFR have small effects and are not diagnostic. For meaningful interpretation, clinical lab values and medical history are essential. Evidence strength varies: strong for LDL in cardiovascular risk, moderate for vitamin D in immune function. Always consult a doctor for personalized assessment.