Myths vs facts: Ferritin and sleep

Myth: Ferritin directly controls sleep quality. Fact: Ferritin is an iron-storage protein. Low ferritin (iron deficiency) is associated with Restless Legs Syndrome (RLS), which can severely disrupt sleep. However, ferritin is also an acute-phase reactant – elevated levels may indicate inflammation, which itself can impair sleep. The evidence for a direct causal link between ferritin and sleep is moderate, based largely on observational studies. Iron supplementation for RLS with low ferritin may help some individuals but is not universally effective and carries risks of iron overload. Caution: Unsupervised iron intake can be harmful, especially in men and postmenopausal women. In summary, ferritin is an indirect marker, not a direct sleep regulator. Sleep quality is multifactorial.