Is Silicon Dioxide Safe? - HealthlineMar 25, 2015 . Silicon dioxide (SiO2), also known as silica, is a natural compound . When you look on a food or supplement ingredients list, you often see.what is silicon dioxide in food,What Is Silicon Dioxide in Supplements? | LIVESTRONG.COMSep 16, 2015 . Another name for silicon dioxide is silica, which includes its various. . It is naturally found in the earth, in our body tissues and in our food.