WAPF claims that bacteria do not cause tooth decay:
As for claims that xylitol can prevent tooth decay, I can only say, “Buyer beware!” Such claims are based on the faulty theory that bacteria cause tooth decay. We know from the work of Weston Price that tooth decay is a problem of nutrient deficiencies—the bacteria are just there cleaning up dead tissue.
Is there a consensus in the paleo community?
A related idea is the effect of acid, either produced by bacteria or in acidic beverages like orange juice. Does the acid do nothing at all to the teeth, or is a well-nourished body just able to rebuild the teeth quickly enough?
If I'm well-nourished, and decide to eat some fruit before bed, and not brush my teeth, is that a bad idea?
(I also wonder about xylitol but I'll probably ask a separate question.)