As far as I know DE, food grade or otherwise, is made up of silica. Different concentrations in food grade and non-food grade.
It is not O.K. to breathe that in. Especially over a long period of time. Just like a previous member posted, no dust is O.K. to breathe in.
It is not O.K. to breathe that in. Especially over a long period of time. Just like a previous member posted, no dust is O.K. to breathe in.