How to prepare for Ferritin Labor

Preparing for a ferritin lab test is straightforward but requires attention to a few details. Ferritin is typically measured as part of an iron panel. While strict fasting is not always mandatory, many laboratories recommend fasting for 8–12 hours before blood draw because serum iron levels fluctuate with food intake and time of day. Ferritin itself is less affected by short-term food intake, but it is an acute-phase reactant, meaning inflammation or infection can falsely elevate levels. Therefore, the test should ideally be done when you are feeling well. Iron supplements and high-dose vitamin C should be stopped at least 24 hours prior, as they can skew results. Strenuous exercise and alcohol consumption the day before may also alter values. Interpretation of ferritin must consider other iron markers (transferrin, iron, hemoglobin) and clinical context. Low ferritin suggests iron deficiency, but elevated levels can occur in chronic inflammation, liver disease, or hemochromatosis. Evidence level: practice (based on standard clinical guidelines). Caveat: individual conditions may require specific instructions from your doctor.