The Iron Blood Test measures the iron levels in the blood. This helps in diagnosing iron deficiency (not enough iron) or iron overload (too much iron).
Symptoms of iron deficiency include: Muscle weakness, feeling tired and weak, pale skin, headaches, irritability, difficulty in concentrating, shortness of breath, swollen tongue, feeling cold, etc
For this test, you may be instructed to fast for 12 hours without food and drinks prior to the test. Or this test can be done in the early morning without taking any food except water.