What is being tested?This test measures the amount of hemoglobin, a
protein found in red blood cells, in a blood sample, which is a good indication of the blood’s ability to deliver oxygen to tissues and organs and to transport the waste product carbon dioxide to the lungs, where it is exhaled. If your hemoglobin levels are low, you may have
anemia, a condition in which your body is not getting enough oxygen, causing fatigue and weakness.
The hemoglobin rises when the number of red blood cells increases. The hemoglobin falls to less than normal, indicating anemia, when your body decreases its production of red blood cells, increases its destruction of red blood cells, or if blood is lost due to bleeding.