Normal hemoglobin levels by age: Normal hemoglobin levels in the blood typically

Normal hemoglobin levels in the blood typically depend on sex, age and general health. Abnormally low or high levels of hemoglobin can indicate a range of health conditions, including anemia and sickle cell disease. Hemoglobin is a protein in red blood cells that carries oxygen and carbon dioxide. Learn about normal hemoglobin levels by age and gender, how to measure hemoglobin , and what causes low or high hemoglobin . Low Hemoglobin Count A slightly low hemoglobin count isn't always a sign of illness; it may be normal for some people. Women who are pregnant commonly have low hemoglobin counts. A low hemoglobin level count is generally defined as less than 13.5 grams of hemoglobin per deciliter (135 grams per liter) of blood for men and less than 12 grams per deciliter (120 grams per liter) for women. In children, the definition varies with age and sex. Diseases and conditions that cause your body to ... Find out what constitutes normal haemoglobin levels and their significance for overall health. Learn about the range of haemoglobin levels and the factors affecting them.