This is why I don't ask people, humans are more likely to give an authoritative answer hinting that "you're the problem". I switch between two toothpastes. One

This is why I don't ask people, humans are more likely to give an authoritative answer hinting that "you're the problem". I switch between two toothpastes. One is better for teeth whitening, the other lets me eat ice cream. The sensitive toothpaste are just too safe for me, it doesn't have that minty taste. And I can A/B test between two different ones, even of the same brand, to see which chemical is worse for it. Anyway, to shorten its answer, it's triclosan, sodium lauryl sulfate, sodium hydroxite, or possibly some of the flavorings.