Here's a paper that describes in vivo P. gingivalis interaction with iron. https://pmc.ncbi.nlm.nih.gov/articles/PMC2825758/ https://pmc.ncbi.nlm.nih.gov/artic

Here's a paper that describes in vivo P. gingivalis interaction with iron. https://pmc.ncbi.nlm.nih.gov/articles/PMC2825758/ 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 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.