Possibly-related:

* 8sleep blog about the study: https://www.eightsleep.com/blog/research-paper-reveals-the-e...

* "Sleep and subjective age: protect your sleep if you want to feel young" https://royalsocietypublishing.org/doi/10.1098/rspb.2024.017...

9 of the 10 authors work for the company that makes the $2k mattress cover?