Hemoglobin

The hemoglobin (Hb) test measures the amount of hemoglobin in the blood, an an iron-containing protein which is found in the Red Blood Cells (RBCs) and carries oxygen from the lungs to the body tissues. This test is often done as part of a complete blood count (CBC) to check for anemia, a condition in which your body has fewer red blood cells than normal. Abnormally high or low Hb can cause symptoms like exhaustion and shortness of breath.
In adults, the average hemoglobin level is slightly higher for men than for women. You can increase your hemoglobin level by adding iron rich foods in your diet and by taking iron supplements.

The hemoglobin test measures the amount of hemoglobin in the blood.

Hemoglobin (Hb) is a protein found in red blood cells (RBCs) that carries oxygen from the lungs to the body tissues, and to exchange the oxygen for carbon dioxide. Hemoglobin then carries the carbon dioxide back to the lungs and where it is exchanged for oxygen. Iron is an essential part of hemoglobin. Most blood cells, including red blood cells, are produced regularly in your bone marrow (present within the cavities of many of large bones). To produce hemoglobin and red blood cells, your body needs iron, vitamin B12, folate and other nutrients from the foods you eat.

A decrease in hemoglobin concentration in blood results in anemia. Anemia is a blood disorder characterized by a decrease in the total amount of red blood cells (RBCs) or hemoglobin in the blood or a lowered ability of the blood to carry oxygen to body organs and tissues. Anemia is the most common blood disorder, affecting about a third of the global population and can cause symptoms like tiredness (fatigue), weakness, shortness of breath etc.

The hemoglobin test is usually performed as a part of complete blood count (CBC) test.