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.

Scientists have long known that people living at high altitudes, where oxygen levels are low, have lower rates of diabetes ...

Want to live longer? Just breathe less oxygen. Scientists at Massachusetts General Hospital have discovered that living in a state of hypoxia — having low oxygen in your body tissue — may actually ...

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 ...