Amorphous silicon dioxide is considered non-toxic. It is approved as a food additive (E551) and is contained in many foods as filler and flow promoter.

 

In vitro studies on stomach and intestinal cells show that the health of isolated cells can only be damaged by ultrahigh particle concentrations [1]. Amorphous silicon dioxide is excreted undigested because of its poor solubility.

 

 

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