"Calcium silicate is used as an anticaking agent in food preparation, including table salt and as an antacid. It is approved by the United Nations' FAO and WHO

"Calcium silicate is used as an anticaking agent in food preparation, including table salt and as an antacid. It is approved by the United Nations' FAO and WHO bodies as a safe food additive in a large variety of products." [1] This does not invalidate your questions, however. No idea what happens when "anticaking agent" ends up in everything. 1 - https://en.wikipedia.org/wiki/Calcium_silicate#Use https://en.wikipedia.org/wiki/Calcium_silicate#Use