Hemoglobin is an iron-rich protein in red blood cells. Oxygen entering the lungs attaches to the hemoglobin in the blood, which carries it to the tissues in the body. When someone has insufficient red blood cells or the ones they have do not work properly, the body is left short of the oxygen it needs to function. This condition is called anemia.
Here, we will look at the role of hemoglobin, and how levels of it in the blood are tested. We also examine the main kinds of anemia in more detail and explore ways to prevent the condition.
Each hemoglobin protein can carry four molecules of oxygen, which are delivered throughout the body by red blood cells. Every one of the body’s billions of cells needs oxygen to repair and maintain itself.