Ferritin
μg/L
Iron store. Deficiency impairs cognition and work capacity; excess is not a performance upgrade.
Iron-deficiency anemia has a clear clinical path to fatigue and cognitive slowing. That is not a license to treat high ferritin as an executive-function stack. The interesting causal question is correction of deficit, not megadosing.
Also called iron stores.
Incident edges
MECHANISM
Randomized trial · Moderate
Ferritin→Cognitive performance
Fix a ferritin deficit and attention can move. Raise a normal ferritin and you have a supplement ad.