Comment by wh-uws

This one of those things that sounds silly but is actually very easy to test and see it can be a real issue.

Tom Scott did a great video on it a while back

https://youtu.be/1Nh_vxpycEA

Do yourself a favor and get an air quality monitor like an awair

https://getawair.com/

and monitor the levels.

Making sure they are good in whatever indoor areas you spend a good amount of time in is a night and day difference cognitively.