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A hemoglobin test is used to find out how much hemoglobin is in your blood. It is most often used to determine if you have low levels of RBC, a condition known as anemia.
In addition to identifying anemia, a hemoglobin test can be involved in the diagnosis of other health problems like liver and kidney disease, blood disorders, malnutrition, some kinds of cancer, and heart and lung conditions.
If you have been treated for anemia or other conditions that can affect hemoglobin levels, a hemoglobin test may be ordered to check your response to treatment and monitor the progression of your overall health.
What is a hemoglobin test?
A hemoglobin test measures the amount of hemoglobin in your blood. Hemoglobin is a protein that’s the main component of red blood cells (erythrocytes). Hemoglobin contains iron, which allows it to bind to oxygen. Hemoglobin enables your red blood cells to carry oxygen from your lungs to other tissues and organs throughout your body.
The amount of hemoglobin you have, or your hemoglobin levels, provides clues about how healthy your red blood cells are. Knowing your hemoglobin level can help a healthcare provider diagnose blood disorders and other conditions. Hemoglobin tests are commonly used to diagnose anemia, which involves not having enough hemoglobin or healthy red blood cells.