>>gpi+(OP)
I haven't heard this before - the change isn't that large but but it really does drop after 80

My inclination is that this could still just be a selection effect. For people who are prone to cancer, you are probably dead by 80.

https://www.cancer.gov/about-cancer/causes-prevention/risk/a...

>>flawn+0D
Here's a paper that describes in vivo P. gingivalis interaction with iron.

https://pmc.ncbi.nlm.nih.gov/articles/PMC2825758/

There's some suggestion that P. gingivalis is implicated in system wide effects: https://www.nature.com/articles/s41368-022-00215-y

I've read various other things about it's pro-inflammatory effect.

I'm somewhat wary of dental hygienists given how much trauma they seem to impart and the consequential risk of getting oral bacteria into the bloodstream.