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 ...

A low oxygen environment- similar to that at Mount Everest Base camp- has neuroprotective effects and restores movement in mouse models of Parkinson’s disease. The corresponding study was published in ...

Medically reviewed by Andrea L. Braden, MD Key Takeaways Anemia can make you feel tired because your body isn't getting ...

Elizabeth Cooney is a cardiovascular disease reporter at STAT, covering heart, stroke, and metabolic conditions. You can reach Liz on Signal at LizC.22. Oxygen is the breath of life, right? Because it ...