What is it used for?A hemoglobin test is often used to check for anemia, a condition in which your body has fewer red blood cells than normal. If you have anemia, your cells don't get all the oxygen they need. Hemoglobin tests are also frequently performed with other tests, such as:Hematocrit, which measures the percentage of red blood cells in your bloodComplete blood count, which measures the number and type of cells in your blood
