Oxygen is essential for human life. Oxygen is present in the air, when we breathe, oxygen will enter the lungs. A very important component of blood is Hemoglobin (Hb) which will transport oxygen from the lungs to necessary places in the body to ensure life. So what is the normal concentration of oxygen in the blood?

Blood oxygen levels are a measure of how much oxygen red blood cells carry in the body. Maintaining a healthy balance of oxygen saturation in the blood is important for overall health. People with chronic conditions, including asthma, heart disease, or chronic obstructive pulmonary disease (COPD), need to monitor their blood oxygen levels regularly.