How are Ferritin and sleep related?

Ferritin is the primary iron storage protein and a key biomarker for iron status. Low ferritin indicates iron deficiency, which is strongly linked to sleep disturbances, particularly Restless Legs Syndrome (RLS). RLS causes uncomfortable sensations in the legs and an irresistible urge to move them, especially at rest, leading to difficulty falling asleep and frequent awakenings. Clinical studies show that iron supplementation in deficient individuals can reduce RLS severity and improve sleep quality. Iron is also involved in dopamine synthesis and melatonin regulation, so deficiency may disrupt circadian rhythms and overall sleep architecture. However, the evidence for a direct effect of ferritin on general sleep quality (without RLS) is more moderate. A ferritin level below 30 µg/L is considered absolute deficiency; levels between 30 and 100 µg/L may still be symptomatic in some individuals. Caveat: Ferritin is an acute-phase reactant – it can be falsely elevated during inflammation. Therefore, concurrent measurement of C-reactive protein (CRP) is recommended. A blood test is the gold standard for assessing current iron status; DNA tests can only indicate genetic predispositions for iron metabolism (e.g., HFE variants) but not actual levels. MyBody-X offers both blood and DNA tests, but for ferritin, the blood test is the appropriate choice.