Spiny Norman said:

Denis – The COVID Info Guy
@thecovidinfoguy.bsky.social
A US study of 150 adults with prediabetes found that running a HEPA air purifier in their bedroom for 5 weeks improved blood sugar control.

• 36% less fine particle pollution
• 8% fewer blood sugar swings
• 17% lower blood sugar after breakfast
• 13% lower post-meal peaks

Not yet peer-reviewed.

Bluesky

About time I got one anyway.

This one is recommended and looks a decent deal