The signs of low ferritin, a protein that stores iron in your body, include fatigue, dizziness, and headaches. High ferritin can cause stomach pain, heart palpitations, joint pain, and more. To test ...
Ferritin is a blood protein that stores iron. A ferritin blood test can indicate if iron levels are high or low. Low levels can indicate anemia. Low ferritin levels may indicate an iron deficiency.