DE contains some heavy metals, ... uranium, thallium, lithium, cadmium... about 1 part to 10,000,000
Arsenic about 1 part to 4 million
It also contains some silica.
I just say this because I have had people get analysis' and then bitch....
They shouldn't bitch at all

All of those elements are part of the periodic table, and we require them!, in nano trace quantities.
Just like drinking isotonic sea water (read about it), also contains the complete periodic table elements.
And I feel GREAT! after doing just that, for about a month now (and my old dog too!)
Cheers!