FD&C Lake Blue #1

FD&C Lake Blue #1 is a synthetic color additive that provides a blue hue. It is a "lake" pigment, meaning the dye (FD&C Blue #1, also known as Brilliant Blue FCF) is mixed with a metallic salt, usually aluminum, to make it insoluble in water. This form is often used when the color needs to be stable in fats or oils.

Manufacturers add FD&C Lake Blue #1 to provide a bright blue color to foods. It is commonly found in products like cookies, biscuits, baking decorations, dessert toppings, ice cream, and frozen yogurt. Its insoluble nature makes it suitable for products with low moisture or high fat content.

FD&C Lake 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, which includes Blue 1 (the dye form of this lake). JECFA has evaluated Brilliant Blue FCF (the dye form) and set an acceptable daily intake. EFSA has also evaluated Brilliant Blue FCF. Some studies have suggested a link between synthetic food colors, including Blue 1, and hyperactivity in some children, but the evidence is mixed, and regulatory bodies continue to review the data.