Silicon dioxide when dried and in the powdered state are known to have caused many respiratory ailments. Fine dust is airborne which is readily inhaled by unprotected individuals and damage their lungs. Diseases like bronchitis and lung cancer are some. They can also exacerbate allergies and autoimmune diseases because they are insoluble to human body they will eventually create triggers to inflammation. Calcium carbonate is highly toxic if ingested at a high amount.