What is FD&C1 Blue 1?
FD&C Blue 1, also known as brilliant blue or E133, is a U.S. Food and Drug Administration (U.S. FDA) certified artificial food color widely used in the food industry to provide food with a vibrant blue color.

Is FD&C Blue 1 safe?
The U.S. FDA has reviewed and approved FD&C Blue 1 as safe for use in food, drugs, and cosmetics2.

How do I know if a product contains Blue 1?
All certified added colors are listed on the ingredients statement label of the product. FDA permits FD&C Blue 1 to be declared on the ingredients statement label by name – e.g., “FD&C Blue 1” or “Blue 1”.

Sources:
1FD&C (Federal Food Drug & Cosmetic Act)
2Color Additive Status List (2009, December). In U.S. Food and Drug Administration. Retrieved May 22, 2014.