Learn about your blood oxygen level, including what it is, how to increase it, and more.

The seals’ ability to detect the amount of oxygen in their blood may help them make diving decisions and avoid drowning.

How do seals know how long to hold their breath? The sea mammals may actually be able to sense the amount of oxygen in their blood—something we humans can't do.

The circulatory system consists of one heart, five liters of blood, and approximately 96,000 kilometers of blood vessels, responsible for transporting nutrients and waste throughout the body ...

Pope Francis suffered a respiratory crisis that required he be placed on oxygen, the Vatican said on Saturday, as the pontiff remains in critical condition at Rome's Gemelli Hospital. The ...

The U.S. health regulator on Monday proposed new guidelines for widely-used blood oxygen monitoring devices to improve their performance across skin tones amid growing evidence that the current ...

SCIENTISTS have developed a way of assessing the ability of red blood cells to deliver oxygen by measuring their shape. This test could improve specialist transplant and transfusion practice as ...

A new sensor could soon allow hospital patients' blood oxygen levels to be checked via their breath. The technology is claimed to be more reliable and less painful than existing traditional methods.

A blood oxygen level indicates how well the body distributes oxygen from the lungs to all of its cells. What does it mean to have low blood oxygen?

The Apple Watch Series 9 and Ultra 2 will now be sold without their blood oxygen feature. Apple says the move will allow it to sell its high-end watches while staying in compliance amid an ongoing ...

Apple put up a notice on its site, warning customers that Apple Watch S9 and Ultra 2 no longer include the blood oxygen feature.

Apple must stop selling its Series 9 and Ultra 2 watches with blood oxygen monitoring functionality. Apple has been in an ongoing patent dispute with medtech company Masimo over the feature.