Typical symptoms of iron deficiency (low ferritin) include fatigue, pallor, shortness of breath on exertion, poor concentration, brittle nails, and hair loss. Restless legs syndrome and increased susceptibility to infections may also occur. Ferritin is the key storage marker – a low level (<30 µg/L) indicates depleted iron stores even if hemoglobin is still normal. However, symptoms are non‑specific and can have other causes. A single ferritin test is insufficient; hemoglobin, transferrin saturation, and CRP should be measured to rule out inflammation, which can falsely elevate ferritin. Once deficiency is confirmed, the underlying cause (e.g., blood loss, malabsorption) must be investigated. MyBody‑X offers ferritin measurement, but interpretation should always be done by a physician.
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