I brush (and floss, and clean) immediately after eating. Having trapped food for any amount of time doesn’t do anyone any good.
Perhaps people who brush three or more times a day are also more likely to eat a healthy diet and maintain a healthy weight.
I brush once a day - after I get up in the morning. I’m 66 and my teeth are great.
That being said, I do have some fillings because my parents never made me brush. Even though my teeth are obviously genetically on the strong side, 18 years of no brushing and lots of candy took its toll.
Genetics, genetics, genetics....
I suspect that it is much more likely that gum disease is an early symptom of underlying health problems that eventually lead to diabetes, stroke, and heart disease.
But will it help ward off corona virus?
Gosh - how can one enjoy the residual flavor of that Hot Fudge Sundae if one brushes one’s teeth right afterwards?
That was painful, let me use non-PC regular English:
Gosh - how can one enjoy the residual flavor of that Hot Fudge Sundae if he brushes his teeth right afterwards?
And it is more likely those people have a serious case of OCD and/or germaphobia. /s
How about “people who are fastidious are much less likely to become obese”.
So could getting a haircut once a month.
Is it truly the brushing of the teeth, or is the 3-times-a-day brushing habit part of whole set of behaviors that the persons with that habit do, such as avoiding carbonated surgery drinks & candy bars, not frequenting the “fast food” chains very much, not eating too much carbs, getting enough physical activity and like behaviors that help avoid both obesity & diabetes??
Unless a study controls for the matching of other variables such as the kind of items that I just mentioned, the teeth brushing is only a corollary finding, not a “cause” of the reduced diabetes.