Eating causes a drop in oral pH leading to mineral loss from teeth, but saliva can remineralize teeth if the mouth returns to a neutral state.

“anytime we eat our mouth is the beginning of the digestive system so we release amase which is an enzyme that helps break down our food and in doing that the pH drops this is how we start digestion when that happens we lose minerals in our teeth the acid will leech out calcium phosphorus and minerals from our teeth — but the the concern is we don't want it to stay in that acidic state for for too long in that demineralized state for too long — because if we allow our body to do its thing our saliva will naturally remineralize our teeth”

“the problem is in modern society we tend to be snacking and grazing and sipping all of the time so we're not giving our mouths enough of a break enough of an opportunity to remineralize so many of us are staying in the state of constant acidity and demineralization”