Can Ferritin help with Sport?

Ferritin is the storage form of iron, a key mineral for oxygen transport (hemoglobin) and mitochondrial energy production. In athletes, low ferritin can impair aerobic performance, endurance, and recovery. Human studies show that iron deficiency—even without anemia—reduces VO₂max and exercise capacity. However, ferritin is not a direct performance enhancer: supplementation only benefits those with confirmed deficiency. Also, ferritin is an acute-phase reactant, so inflammation can falsely elevate levels, masking true iron stores. Home blood tests (e.g., MyBody-X) are convenient screening tools, but venous blood draws and medical interpretation are required for diagnosis and treatment. Excess iron (hemochromatosis) is toxic. Evidence: human-moderate. Bottom line: ferritin matters for sport, but only in the context of individual iron status—not as a universal booster.