HGB: Understanding Hemoglobin - Definition & Normal Levels

The medical abbreviation "hgb" stands for "hemoglobin". Hemoglobin is a protein in red blood cells that carries oxygen from the lungs to the tissues and organs of the body. It also transports carbon dioxide away from the tissues and back to the lungs. The normal range of hemoglobin levels varies depending on age, sex, and altitude, but for adults, it is typically between 13.5 to 17.5 grams per deciliter (g/dL) for men and 12.0 to 15.5 g/dL for women.