www.nhlbi.nih.gov most common symptom symptoms signs and symptoms of iron deficiency The National Heart, Lung, and Blood Institute iron deficiency [nhlbi.nih.gov] [nhlbi.nih.gov] signs and symptoms of iron deficiency fatigue What Are the Signs and Symptoms of Iron-Deficiency Anemia? NHLBI.NIH.gov NHLBI.NIH.gov What Are the Signs and Symptoms of Iron-Deficiency Anemia? symptoms of anemia What Are the Signs and Symptoms of Iron-Deficiency Anemia? fatiga National Heart, Lung, and Blood Institute National Heart, Lung, and Blood Institute lack of iron will affect the health of your nails