Silicon dioxide (E551)
Updated October 2, 2026
Silicon dioxide (E551) is a food additive in the “other additives” group. It appears in 3,086 products in our database, 266 of them sold in the US.
Quick facts
- Also known as
- Silica, E551
- E-number
- E551
- Function
- Other additives
- Found in
- 3,086 products (266 sold in the US)
Foods that commonly contain Silicon dioxide
Share of published products in each category whose ingredient list includes Silicon dioxide.
Popular products with Silicon dioxide
e NOVA 4 
e NOVA 4 
NOVA 4 
NOVA 4 
e NOVA 4 
NOVA 4 
e NOVA 4 
NOVA 4 
c NOVA 4 
c NOVA 4 Silicon dioxide-free alternatives
Popular products from the same categories that don't list Silicon dioxide and score Nutri-Score A–C.
c NOVA 4 
a NOVA 4 
a NOVA 4 
a NOVA 4 
a NOVA 1 How to spot Silicon dioxide on a label
Look for any of these names in the ingredient list:
Related additives
Frequently asked questions
What foods contain Silicon dioxide?
In our database, Silicon dioxide most often appears in instant noodles, dietary supplements, groceries and protein powders.
How many products contain Silicon dioxide?
3,086 published products on Foodmetria list Silicon dioxide, including 266 sold in the United States. Counts come from ingredient lists in Open Food Facts and update daily.
Product data: Open Food Facts (ODbL), updated daily. Additive information is for general education and is not medical advice. Always check the package label. Our methodology.