The relationship between ferritin (iron stores) and skin health is complex and not fully understood. Ferritin is a key marker of total body iron. Iron deficiency (low ferritin) can impair oxygen delivery to skin cells, potentially leading to pallor, dryness, brittle nails, and hair loss. Some observational studies and case reports suggest links between iron deficiency and skin conditions like pruritus, eczema, or even pica (craving non-food items). However, the evidence is largely mechanistic or based on small studies; large-scale randomized trials are lacking. Low ferritin alone is rarely a direct cause of skin issues—other deficiencies (e.g., B12, zinc) or underlying diseases often coexist. Consumer tests like MyBody-X can measure ferritin, but results should be interpreted with caution. Evidence grade: mechanistic/unclear. Caveat: Do not self-treat iron deficiency based solely on a home test; consult a physician for proper diagnosis and supplementation, as excess iron can be harmful.
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