I doubt an oral colony could produce enough formate to be an issue. Methanol toxicity hits in the range of grams of methanol over a short period. I have no id

I doubt an oral colony could produce enough formate to be an issue. Methanol toxicity hits in the range of grams of methanol over a short period. I have no idea how the bacteria are applied (oral rinse) but maybe enough got ingested to colonize the intestines? That could produce enough formate.