FD&C Blue 2 Lake

FD&C Blue 2 Lake is a synthetic color additive. It is a "lake" pigment, meaning the dye FD&C Blue 2 (also known as Indigotine) is adsorbed onto an insoluble base, typically aluminum hydroxide. This process makes the color more stable and suitable for use in products with fats or in dry mixes.

Manufacturers add FD&C Blue 2 Lake to provide a blue color to foods. Its lake form makes it particularly useful in products where the color needs to be stable in fats or dry environments, such as baked goods, icings, candies, and snack foods.

FD&C Blue 2 Lake is an FDA-approved color additive for use in food. JECFA has evaluated Indigotine (the dye from which the lake is made) and set an acceptable daily intake. EFSA has also evaluated Indigotine and concluded it is safe for use as a food additive at specified levels. While generally considered safe for consumption, some individuals may experience sensitivities. In April 2025, the FDA announced a plan to phase out petroleum-based synthetic dyes, including FD&C Blue 2.