What to watch with Ferritin and Abnehmen?

Ferritin is the main iron storage marker. During weight loss (Abnehmen), ferritin levels can be relevant for several reasons: calorie-restricted diets may reduce iron intake, especially in vegetarian/vegan patterns; rapid weight loss (e.g., after bariatric surgery) can lead to iron deficiency; and low ferritin is associated with fatigue, which can hinder exercise adherence. However, evidence for a direct causal role of ferritin in weight loss is weak and mostly observational. Elevated ferritin may indicate inflammation or iron overload (hemochromatosis), requiring medical workup. Without clinical indication, iron supplementation is not recommended due to potential toxicity. A single ferritin test has limited value; it should be interpreted with CRP, transferrin saturation, and clinical context. Evidence: human-observational, mechanistic. Sources: none specific in provided context.