When Fitbit launched the Charge 4 fitness band, one of the features we found the most interesting was its ability to estimate users' blood oxygen saturation levels through its SpO2 monitor. Users ...

A healthy blood oxygen level is 95% to 100% on a pulse oximeter (SpO2) or 75 to 100 mm Hg on an arterial blood gas test. A reading below 95% is considered low and may warrant medical attention. Your ...

Normal blood oxygen levels mean that there is enough oxygen in your red blood cells to keep your vital organs and tissues functioning properly. You can easily check your blood oxygen levels with an ...