What is low hemoglobin? Hemoglobin is a protein in your red blood cells. Your red blood cells carry oxygen throughout your body. Oxygen powers your cells and gives you energy. A low hemoglobin level may be a sign of several conditions, including different kinds of anemia and cancer.

Low hemoglobin means you don't have enough of the red blood cells that carry oxygen throughout your body. When you have low hemoglobin, your cells and tissues don't receive as much oxygen as they need, which can make you feel weak and tired.

Low levels of the protein in red blood cells that carry oxygen, called hemoglobin, is the main sign of anemia. Some people learn they have low hemoglobin when they donate blood. If you're told that you can't donate because of low hemoglobin, make a medical appointment.

A low hemoglobin count is generally defined as less than 13.2 grams of hemoglobin per deciliter (132 grams per liter) of blood for men and less than 11.6 grams per deciliter (116 grams per liter) for women. In children, the definition varies with age and sex.

Anemia is defined as a low number of red blood cells. In a routine blood test, anemia is reported as a low hemoglobin or hematocrit. Hemoglobin is the main protein in your red blood cells.

Low hemoglobin is when your body produces fewer red blood cells than normal. Different diseases, including anemia, cancer, and inherited blood disorders, can cause low hemoglobin. Low hemoglobin can also occur due to blood loss. Symptoms of low hemoglobin include shortness of breath, fast heartbeat, pale skin, chest pain, weakness, dizziness ...

High or low hemoglobin levels can be a sign of serious illness. Learn the causes, risk factors, symptoms, and treatments for abnormal hemoglobin.

Anemia is when you have low levels of healthy red blood cells to carry oxygen throughout your body. Symptoms include fatigue, weakness and feeling short of breath. They can be mild or severe. Anemia may be life-threatening. Many things may cause it and there are different types of the condition.

Low hemoglobin means that your body isn’t getting all the oxygen it needs. Find out what causes low hemoglobin and what the effects of low levels are.