Mehraveh Sayyah on Instagram: "Functional iron deficiency occurs when iron is stored but unavailable, impairing oxygen delivery despite normal hemoglobin.Symptoms include pale mucus membranes, skin, fatigue, brittle nails, dry skin, hair loss, mouth cracks, burning tongue, poor healing, dizziness, cold extremities, and restless legs. #irondeficiency #pale #dryskin #lowiron #paleskin #ferritin #pov #fatigue #darkcircles #dullskin #tired #skin #foryou #foryoupage #foryourpage #fyp"