Your endothelium make it naturally and it helps with vasodilation.... But I'm not a doctor and am interested in his answer as well. Been thinking about dropping the Listerine, but have bad gums and seem to get tooth pain when I don't use it.
Discussion
Listerine is not helping your gums. Stop the listerine and do 90 days of ONLY beef/butter/bacon/eggs and report back on how your gums are doing. Also take a combo Vitamin D3/K2 gelcap (Amazon)
I did do a 3 month strict carnivore diet last year and noticed a drastic improvement in my dental health(gums looked great, like the bubble gum pink they are supposed to, not inflammed red). And I said gums(I do have gum disease) but the pain is actually from a cavity I don't want to go get filled.... I also noticed that it improved during the carnivore period as well. As long as I stay away from sweets other than some berries it seems to do alright and doesn't bother me. The Listerine was just for good measure and I knew it couldn't be good for me. Going to trash it and look for something more natural and not antibacterial. Thanks for the advice!