E170 is a food additive commonly known as silicon dioxide. It is used as an anti-caking agent in various powdered foods, helping to prevent clumping and ensuring a smooth texture. This additive is often found in products like spices, seasonings, and instant soups. Silicon dioxide is considered safe for consumption and is approved by food safety authorities, including the European Food Safety Authority (EFSA) and the U.S. Food and Drug Administration (FDA). It is naturally occurring in many foods and is also used in non-food products, such as cosmetics and pharmaceuticals.