What role does Ferritin play in Müdigkeit?

Ferritin is an iron-storage protein. Low ferritin indicates depleted iron stores, which can lead to iron-deficiency anemia and fatigue, as iron is critical for oxygen transport and cellular energy metabolism. The provided context does not discuss ferritin; it covers B vitamins, IgG food sensitivity tests, and pharmacogenetics. The evidence linking low ferritin to fatigue is well-established in physiology (mechanistic), but not directly supported by the given sources. Caveat: Ferritin levels must be interpreted with clinical context – inflammation can falsely elevate ferritin, and deficiency may arise from blood loss, diet, or malabsorption. While B vitamins can support energy metabolism, they do not address iron deficiency. For persistent fatigue, a full iron panel and medical evaluation are recommended.