warum nehme ich nicht ab test — which blood markers matter?

The question of which blood markers matter for weight loss is valid, but evidence for routine testing in healthy individuals without specific symptoms is limited. Classic markers such as fasting glucose, HbA1c, insulin (HOMA-IR), TSH, fT3, fT4, lipid profile, vitamin D, ferritin, and hs-CRP can provide clues about metabolic dysfunction, thyroid function, or inflammation. However, studies show that these values alone rarely explain stalled weight loss – calorie balance, sleep, stress, and physical activity are often more decisive. Consumer tests (e.g., MyBody-X) often include markers like CRP, vitamin D, or homocysteine, but interpretation without medical guidance is risky. Some genetic variants (e.g., TCF7L2, FTO) have only small effects and are not measured as blood markers. The evidence for such tests is mixed: while individual biomarkers are clinically established (e.g., TSH), many combinations lack proven benefit. Safety note: consult a physician for unclear findings; self-tests do not replace medical diagnosis.