To test the blood oxygen level, the Oura Ring Gen3 and Gen4 feature LED sensors that emit red and infrared light into the finger on which you're wearing the ring and then monitor the reflected ...

FDA seeks to boost accuracy of blood-oxygen monitors across skin tones By Bhanvi Satija January 6, 202512:50 PM PSTUpdated January 6, 2025 ...

Your blood serves numerous roles to maintain your health. To carry out these functions, blood contains a multitude of ...