Celebrities, CEOs, and health optimizers, including Mark Zuckerberg, Jennifer Aniston, Kim Kardashian, and Gwyneth Paltrow, have been seen sporting the Oura ring. The wearable has become a wellness staple (more than 2.5 million rings have been sold), as a growing number of people have started tracking their biomarkers, especially sleep, to optimize their overall health. …
