Blood oxygen levels refer to the amount of oxygen circulating in the blood. Normal blood oxygen levels fall between 75 and 100 millimeters of mercury (mm Hg) on arterial blood gas (ABG) test results.

If someone’s blood oxygen level falls below 60 mm Hg, there may not be enough oxygen reaching the body’s vital organs. This can lead to symptoms such as shortness of breath and dizziness. This article ...

Your body runs on blood like a car runs on fuel – without enough of it, everything starts breaking down. When blood levels drop too low, your organs begin struggling to get the oxygen and nutrients ...

People with obstructive sleep apnea (OSA) typically have low oxygen levels when they sleep because of gaps in their breathing. Blood oxygen during sleep is considered low if levels are below 95%.

Oxygen is vital to the body. When levels of oxygen in the blood get too low, serious problems can arise. This can happen as people recover from some disorders that can drive oxygen levels down, such ...

Red blood cells transport oxygen throughout your body, including to vital organs and tissues. They also help your body get rid of carbon dioxide. Too little or too many red blood cells may be ...