What is a Hemoglobin?

A hemoglobin is the protein that is found in your red blood cells. It carries oxygen in your blood and if the hemoglobin is higher than normal, it could indicate a problem. This may be due to congenital heart disease, increased blood cells or pulmonary fibrosis. You can find more information here: http://www.nlm.nih.gov/medlineplus/ency/article/003645.htm .
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