Ingredient · E133

Blue I

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Source
Not animal-derived
Allergen
No
Role in food
Manufacturers add Blue 1 to make foods more visually appealing. It is commonly found …

What it is

Blue 1 is a synthetic food coloring that gives foods a bright blue shade. It is made from petroleum.

Why it's used

Manufacturers add Blue 1 to make foods more visually appealing. It is commonly found in candies, beverages, baked goods, and some dairy products.

Health notes

Blue 1 is an FDA-approved color additive for use in food. In April 2025, the FDA announced a plan to phase out petroleum-based synthetic dyes, including Blue 1. JECFA has evaluated Blue 1 and set an acceptable daily intake. EFSA has also evaluated it. Some studies suggest a possible link between synthetic food dyes, including Blue 1, and hyperactivity in some children, though evidence is mixed and more research is needed.

Allergen info

Not a major allergen.

Products containing Blue I

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Last updated: September 28, 2026

Note: This site presents label data from USDA FoodData Central for general information. It is not medical advice. Check the package label; formulations change.