Evidence check: Ferritin in the context of Abnehmen

Ferritin is an iron storage protein and not a direct marker for weight loss. In the context of losing weight, ferritin can be indirectly relevant: low ferritin (iron deficiency) may cause fatigue and reduced exercise capacity, hindering calorie expenditure. Conversely, elevated ferritin may indicate inflammation or hemochromatosis, which can affect metabolism. Evidence for a direct link between ferritin and weight loss is weak and mostly observational. Caloric restriction or fasting can alter iron absorption, but ferritin levels change slowly. A MyBody-X test or blood panel can measure ferritin, but interpretation requires a physician. Caution: ferritin is not a weight-loss marker; weight reduction should rely on calorie balance, exercise, and healthy diet. If ferritin is abnormal (e.g., <30 ng/mL or >300 ng/mL), medical evaluation is needed.