IVORY COAST (CYBER CITY, CALIFORNIA) on 07/05/2009
Replied By Deborah (Prattville, Al) on 11/21/2011
Replied By Diane (Ca, US) on 07/16/2014
Silica, which is what DM is mostly, (it is not glass, though a large percentage of glass and don't forget 3000 degrees) is not good to inhale, silicosis is a problem with working with clay also which has a lot of silica so best to take care when working with the dry, like using for insect control, even mixing with water.
It does cut insects bodies and parasites. Silica is important to the body.
Food grade has been used in food and animal foods for a long time, so I don't think there is a worry.