yeh i know it is not for ingestion...it was old roach killer. things i find on it refer to ingestion and not topical treatments.
i am going to check out that toothpowder though...alternatives are always nice.
there was actually a harvard profess. that got caught lying on a study about flouride causing a certain bone cancer i read a bit ago. he said it didnt and fudged on some of his study that proved that it did.
if you like to read on stuff like that you should check out