Amorphous silicon dioxides have been used for more than four decades as food additives (E551). They can be added to certain powdery foods such as table salt, seasonings, dietary supplements, and dry foods [3] to avoid clogging. Moreover, they are permitted for use as carrier substances in emulsifying agents, colorings, and flavors [9]. According to the EU Rules on Organic Farming[11], SiO2 additives are also approved for use in biological food. Since silicon dioxide can neither be absorbed nor salvaged by the human organism, it is excreted in its unchanged form. Amorphous SiO2 particles have been approved for use as food additives since they were first tested more than 40 years ago. Since the particle size and structure have remained unchanged, these substances are not considered products of modern nanotechnology [4].